Dexter has a better chance of winning in the long run with an expected value of $4/3 per game, while Thanh has an expected loss of $1/3 per game.
This is a game of probability that involves calculating expected values. Let's first calculate the probability of drawing a black chip:
Probability of drawing a black chip = (number of black chips) / (total number of chips) = 10 / 15 = 2/3
Similarly, the probability of drawing a white chip can be calculated as:
Probability of drawing a white chip = (number of white chips) / (total number of chips) = 5 / 15 = 1/3
Now, we can calculate the expected value of winning for each player.
For Dexter:
- If he draws a black chip, he will win $7 with probability 2/3
- If he draws a white chip, he will lose $10 with probability 1/3
Expected value of winning for Dexter = (7 x 2/3) + (-10 x 1/3) = 4/3
This means that on average, Dexter will win $4/3 per game.
For Thanh:
- If Dexter draws a black chip, Thanh will lose $7 with probability 2/3
- If Dexter draws a white chip, Thanh will win $10 with probability 1/3
Expected value of winning for Thanh = (-7 x 2/3) + (10 x 1/3) = 1/3
This means that on average, Thanh will win $1/3 per game.
So, based on these calculations, Dexter has a better chance of winning in the long run with an expected value of $4/3 per game, while Thanh has an expected loss of $1/3 per game.
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Find the missing dimension of the cone.
the volume is 1/18π and the radius is 1/3. find the height.
Answer:
h = 3/2
Step-by-step explanation:
Volume of cone formula: V = 1/3 π r²h
We are given volume and the radius so we can plug in those values
1/18π = 1/3 π (1/3)²h
1/18π = 1/3 π 1/9 h
Multiply the fractions on the right side:
1/18π = 1/27πh
Multiply both sides by reciprocal of 1/27 (which is 27)
3/2π = πh
Divide both sides by π
h = 3/2
Hope this helps!
In ΔXYZ, ∠Y=90° and ∠X=60°. ∠ZWY=69° and XW=240. Find the length of ZY to the nearest 10th.
The value of length ZY in nearest 10th place is 1,240.8 units.
What is the value of length ZY?The value of length ZY is calculated as follows;
Considering triangle XYZ;
tan 60 = ZY/XY
let length WY in triangle WYZ = ntan 60 = (ZY)/(240 + n)
ZY = 1.732(240 + n) ------ (1)
Considering triangle WYZ;
tan 69 = ZY/WY
tan 69 = ZY/n
n = ZY/tan69
n = 0.384(ZY) ---------- (2)
The length ZY is calculated as;
Substitute the value of n into equation (1)
ZY = 1.732(240 + 0.384ZY)
ZY = 415.68 + 0.665ZY
0.335ZY = 415.68
ZY = 415.68 / 0.335
ZY = 1,240.8 units
From equation (2);
n = WY = 0.384 (1,240.8)
WY = 476.5 units
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A population of insects increases at a rate of 280 +64 +0.9t^2 insects per day Find the Insect population after 5 days, assuming that there are consects att Round your arwer to the ne
Since we need to round our answer to the nearest whole number, the insect population after 5 days will be approximately 367 insects.
Given the rate at which the insect population increases, we can determine the population after 5 days using the given formula: 280 + 64 + 0.9t^2 insects per day.
First, we need to substitute t with the number of days, which is 5:
280 + 64 + 0.9(5)^2
Now, calculate the value of the equation:
280 + 64 + 0.9(25) = 280 + 64 + 22.5 = 366.5
OR,
The population of insects after 5 days can be found by plugging in t = 5 into the given equation:
Population = 280 + 64 + 0.9(5)^2
Population = 280 + 64 + 22.5
Population = 366.5
Rounding to the nearest insect, the population after 5 days is 367 insects.
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The Wyoming State Trigonometric Society had decided to give away it’s extremely valuable piece of land to the first person who can correctly calculate the properties unique area. The perimeter of the regular hexagon is 24 km
Answer:
first you do the angles time the amount of times you watched the hub and you get the answer and alia use a protractor
3. Use the definition of the Riemann Sum to evaluate S12(x3 – 2x)dx. + - 4. Evaluate: S2x2+x=2 5. Given the velocity in meters/second for v(t) = 8 – 2t, 1 st 56 a.) find the displacement of the particle over the given time interval; b.) find the distance traveled by the particle over the given time interval.
Evaluation of S12(x3 – 2x)dx is- 92.875
We can use the definition of the Riemann Sum to evaluate S12(x3 – 2x)dx as follows:
First, we need to choose the width of our intervals.
Let's choose Δx = 1/2, which means we will have 24 subintervals.
Now, we can use the formula for the Riemann Sum to calculate the sum of the areas of the rectangles.
S12(x3 – 2x)dx ≈ ∑[f(xi)Δx] from i=1 to i=24
where xi is the right endpoint of the ith subinterval,
f(xi) = x[tex]i^3[/tex] – 2xi is the height of the rectangle, and Δx = 1/2 is the width of the rectangle.
Evaluating this sum using the given formula, we get:
S12(x3 – 2x)dx ≈ [f(1/2) + f(1) + f(3/2) + ... + f(11)](1/2)
≈ [[tex](1/2)^3[/tex] – 2(1/2) + (1)^3 – 2(1) + (3/2[tex])^3[/tex] – 2(3/2) + ... + (11[tex])^3[/tex] – 2(11)](1/2)
≈ [- 2361/16](1/2)
≈ - 92.875
4) we can simply evaluate the given integral:
S2x2+x=2 = ∫(2[tex]x^2[/tex] + x)dx from 0 to 2
= [[tex]2/3 x^3 + 1/2 x^2[/tex]] from 0 to 2
= [[tex]2/3 (2)^3 + 1/2 (2)^2[/tex]] - [[tex]2/3 (0)^3 + 1/2 (0)^2[/tex]]
= 16/3
5), we can use the following formulas
to find the displacement and distance traveled by the particle over the given time interval:
Displacement = ∫v(t)dt from 1 to 5
Distance traveled = ∫|v(t)|dt from 1 to 5
where v(t) is the velocity function.
a) To find the displacement, we evaluate the integral:
∫v(t)dt = ∫(8 – 2t)dt from 1 to 5
= [8t – t^2] from 1 to 5
= [[tex]8(5) – (5)^2[/tex]] - [8(1) – [tex](1)^2[/tex]]
= 18 meters
b) To find the distance traveled, we evaluate the integral:
∫|v(t)|dt = ∫|8 – 2t|dt from 1 to 5
= ∫(8 – 2t)dt from 1 to 4 + ∫(2t – 8)dt from 4 to 5
= [8t – [tex]t^2[/tex]] from 1 to 4 + [-t^2 + 8t -16] from 4 to 5
= [8(4) – [tex](4)^2[/tex]] - [8(1) – [tex](1)^2[/tex]] + [[tex]-(5)^2[/tex] + 8(5) -16 -(-[tex](4)^2[/tex] + 8(4) -16)]
= 26 meters
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PLEASE HELP THIS A FRESHMEN QUESTION
Answer:
The total area of the "t" figure is 20 square units.
The figure is made up of a triangle, a square, and a rectangle.
The area of the triangle is (1/2)(base)(height) = (1/2)(4)(3) = 6 square units.
The area of the square is 4^2 = 16 square units.
The area of the rectangle is 2(4)(3) = 24 square units.
The total area of the figure is 6 + 16 + 24 = 46 square units.
However, the question asks for the area of the composite region, which is the shaded region in the figure. The shaded region is a triangle with base 4 units and height 3 units. The area of this triangle is (1/2)(base)(height) = (1/2)(4)(3) = 6 square units.
Therefore, the area of the composite region is 6 square units.
Here is a diagram of the figure with the areas of each shape labeled:
[Image of the "t" figure with the areas of each shape labeled]
Answer:
Step-by-step explanation:
I don't have enough information to answer this.
You babysat your neighbor's children and they paid you $45 for 6 hours. Fill in the t-table for hours (x) and money (y)
you got $45 for 6hours.
one hour=$7.5
two hours=$15
three hours=$7.5*3
calculation=$45/6
At one store a trophy costs $12.50. Engraving costs $0.40 per letter. At another store, the same trophy costs $14.75. Engraving costs $0.25. How many letters must be engraved for the costs to be the same?
Answer: 15 letters.
Step-by-step explanation:
When p is the number of letters being engraved:
12.5 + .4p = 14.75 + .25p
-12.5 -12.5
.4p = 2.25 + .25p
-.25p -.25p
.15p = 2.25
/.15 /.15
p = 15
There would need to be 15 letters engraved for the cost of the trophies to be the same. Hope this helps!
Use technology to answer the following questions.
The times (in seconds) for the CGHS swimmers in the
50m freestyle event are given below:
61 58 59 63 71 63 60 62 60 65 81 58 62
1) Use the Desmos Calculator to find the important
values for the data set.
2) Use SOCCS to describe this dataset in the text box
below. WRITE IN COMPLETE SENTENCES!
There are four most frequent values in the dataset that occur twice: 58, 60, 62, and 63.
How to solveUsing SOCCS, I can determine the essential values and provide a description of the given dataset consisting of times for CGHS swimmers in the 50m freestyle event:
The mean (average) time is 63.0 seconds, calculated by adding all times together and dividing by the total number of observations.
To find the middle value (median), the dataset was sorted in ascending order; thus, the median is 62 seconds.
There are four most frequent values in the dataset that occur twice: 58, 60, 62, and 63.
Calculating the difference between the highest and lowest values provides the range of 23 seconds.
The variance equals approximately 60.92, computed using the formula Σ(x-mean)^2 / (n-1). The resulting standard deviation is around 7.8, presenting some variation.
SOCCS description:
This dataset displays a slightly skewed distribution to the right due to two larger numbers (71 and 81).
One significant outlier exists (81 seconds), affecting the overall outcome significantly higher than other observed times.
From the values obtained via calculation, we get an indication of a balanced dataset: the average and median values show to be quite similar, establishing central tendencies for this specific data set.
Considering its dispersion across the representation, it follows that there is variability presented within the observed durations, utilizing both the range and the comparatively high standard deviation as our objective indicators for such measurement.
In conclusion, with these results, informed insights into the swimmers’ abilities and performances are evident, pinpointing potential areas for future improvements in their training regimes.
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the height and age of each child in a random sample of children was recorded. the value of the correlation coefficient between height and age for the children in the sample was 0.8 . based on the least-squares regression line created from the data to predict the height of a child based on age, which of the following is a correct statement? responses on average, the height of a child is 80% of the age of the child. on average, the height of a child is 80% of the age of the child. the least-squares regression line of height versus age will have a slope of 0.8 . the least-squares regression line of height versus age will have a slope of 0.8 . the proportion of the variation in height that is explained by a regression on age is 0.64 . the proportion of the variation in height that is explained by a regression on age is 0.64 . the least-squares regression line will correctly predict height based on age 80% of the time. the least-squares regression line will correctly predict height based on age 80% of the time. the least-squares regression line will correctly predict height based on age 64% of the time.
The least-squares regression line of height versus age will have a slope of 0.8 . Was true statement option (2)
The correlation coefficient (r) measures the strength and direction of a linear relationship between two variables, in this case, height and age. A correlation coefficient of 0.8 indicates a strong positive linear relationship between height and age. The slope of the least-squares regression line represents the change in the height of a child for each one-unit increase in age.
Therefore, a slope of 0.8 indicates that for each one-year increase in age, the expected increase in height is 0.8 units. The other options are not correct or relevant based on the given information.
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Full Question: the height and age of each child in a random sample of children was recorded. the value of the correlation coefficient between height and age for the children in the sample was 0.8 . based on the least-squares regression line created from the data to predict the height of a child based on age, which of the following is a correct statement?
responses on average,
the height of a child is 80% of the age of the child. on average, the height of a child is 80% of the age of the child. the least-squares regression line of height versus age will have a slope of 0.8 . the least-squares regression line of height versus age will have a slope of 0.8 . the proportion of the variation in height that is explained by a regression on age is 0.64 . the proportion of the variation in height that is explained by a regression on age is 0.64 .The radius of the moon is about 1. 738 mega meters. The formula for the volume of a sphere is v=4/3 nr3. Approximately what is the volume of the moon. Use 3. 14 as an approximation for pi
To calculate the volume of the moon, we can use the formula V = (4/3)πr^3, where r is the radius of the moon.
Given that the radius of the moon is about 1.738 mega meters (or 1,738,000 meters), we can substitute this value into the formula and simplify as follows: V = (4/3) × 3.14 × (1.738 × 10^6)^3 V ≈ 2.196 × 10^19 cubic meters Therefore, approximately, the volume of the moon is 2.196 × 10^19 cubic meters.
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23. The function is defined by f:x → x + 2. Another function g is such that fg: x → 1/x-1 , x ≠ 1
Find g.
how many ways are there to distribute the comic books if there are no restrictions on how many go to each kid (other than the fact that all 20 will be given out)?
There are 15,504 ways to distribute 20 comic books among five kids if there are no restrictions on how many go to each kid.
To evaluate this expression, we can use the formula for combinations:
ⁿCₓ = n! / (x! (n-x)!)
where n is the total number of objects, x is the number of objects to be selected, and "!" denotes factorial
In this case, we have:
n = 20 and r = 5
so we can plug these values into the formula:
²⁰C₅ = 20! / (5! (20-5)!)
= (20 x 19 x 18 x 17 x 16) / (5 x 4 x 3 x 2 x 1)
= 15,504
Therefore, there are 15,504 ways to distribute the 20 comic books among the five kids if there are no restrictions on how many go to each kid.
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Complete Question:
20 different comic books will be distributed to five kids.
How many ways are there to distribute the comic books if there are no restrictions on how many go to each kid (other than the fact that all 20 will be given out)?
If 3/10 of a number is equal to 1/4 what is the number
Answer:
10/12
Step-by-step explanation:
(3/10)x=1/4
3x=10/4
x=10/12
What is the mass of a cylinder of lead with a radius of 1 centimeter and a height of 3 centimeters, given that the density of lead is 11. 4 g/cm?
The mass of the cylinder of lead with a radius of 1 centimeter and a height of 3 centimeters is 107.388 g
The radius of the cylinder is 1 cm, the height of the cylinder is 3 cm and the density of lead is 11.4 g/cm.
Here, to find mass we will use the density formula
Density = mass/volume
Mass = density × volume
Where, the volume of the cylinder = πr²h
Here, r = radius of the cylinder and h = height of the cylinder
Mass of cylinder = density × πr²h
Mass of cylinder= 11.4×3.14×1×1×3
Mass of cylinder = 107.388 g
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Find the area of the triangle. 8 m
5 m
Question content area bottom
Part 1
The area of the triangle is 1 m cubed. (Type a whole number. )
The area of the triangle is 20 square meters.
The formula to find the area of a triangle is A = 1/2 * base * height. In this case, the base of the triangle is 8 meters and the height is 5 meters. Therefore, the area of the triangle is A = 1/2 * 8 m * 5 m = 20 m^2.
We can also check our answer by using the formula A = (b * h) / 2, where b is the base and h is the height of the triangle. Substituting the values given in the question, we get A = (8 m * 5 m) / 2 = 20 m^2. Therefore, the area of the triangle is 20 square meters.
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One bag of dichondra lawn food contains 30 pounds of fertilizer and its recommended coverage is 4000 square feet. if you want to cover a rectangular lawn that is 160 feet by 160 feet, how many pounds of fertilizer do you need?
To cover a rectangular lawn of 160 feet by 160 feet with dichondra lawn food, you would need 210 pounds of fertilizer.
To find the area of the rectangular lawn
Area = Length x Width
Area = 160 ft x 160 ft
Area = 25,600 sq ft
Since one bag of lawn food can cover 4000 square feet, we need to divide the total area of the lawn by the coverage of one bag
Number of bags = Total area ÷ Coverage of one bag
Number of bags = 25,600 sq ft ÷ 4000 sq ft
Number of bags = 6.4
Since we cannot buy a fraction of a bag, we need to round up to the nearest whole number of bags, which is 7.
Therefore, we need 7 bags of lawn food to cover the rectangular lawn. To find the total weight of fertilizer needed, we multiply the number of bags by the weight of one bag
Total weight of fertilizer = Number of bags x Weight of one bag
Total weight of fertilizer = 7 bags x 30 pounds/bag
Total weight of fertilizer = 210 pounds
Thus, we need 210 pounds of fertilizer to cover the rectangular lawn.
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√50-√18+√8+√128-3√2
Please solve this
Step-by-step explanation:
the
answer
of
this
question
is
9 \sqrt{2}
Do you like this (^__^) ??
-3 3/7 times 5 5/6 ........
Answer:
the answer for this problem would be -20
Answer:
-20
Step-by-step explanation:
The easiest way to do it is to change -3 3/7 and 5 5/6 into improper fractions. To do that, let’s take -3 3/7 for example. You would add the numerator by the whole number, and then multiply the denominator by the whole number. Getting you -24/7, the other number would be 35/6 then you multiply the two getting you -840/42, which it turned back into a proper fraction by dividing the two numbers, you would get -20. Hope this helps!
Note: enter your answer and show all the steps that you use to solve this problem in the space provided.
find the area of the parallelogram.
8 cm
9 cm
24 c.m.
not drawn to scale.
i need help i don’t understand
To find the area of a parallelogram, multiply the base length by the height. Therefore, the area of the parallelogram is 8 cm * 24 cm = 192 cm².
How to find the area of the parallelogram with side lengths 8 cm, 9 cm, and a height of 24 cm?To find the area of a parallelogram, you can use the formula A = base × height. In this case, the given measurements are 8 cm for the base, 9 cm for the height, and 24 cm for one of the sides of the parallelogram.
First, identify the base and height of the parallelogram. In this case, the base is 8 cm and the height is 9 cm.
Next, substitute the values into the formula for the area of a parallelogram: A = base × height.
A = 8 cm × 9 cm
Multiply the base and height:
A = 72 cm²
Therefore, the area of the parallelogram is 72 square centimeters. It's important to note that the area is not drawn to scale, so the measurements given are solely used for calculation purposes.
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Select the correct equation that can be used to represent the lumens, L, after x screen layers are added. A. L = 750(0. 975)x B. L = 750(1. 25)x C. L = 750(0. 25)x D. L = 750(0. 75)x
The correct equation that can be used to represent the lumens, L, after x screen layers are added is L = 750(0.75)ˣ. (option d)
Equation A shows that the lumens decrease by 2.5% per layer added. This means that the amount of visible light decreases as more layers are added, which aligns with our common sense understanding.
Equation B shows an increase of 25% per layer added, which does not make sense as more screen layers would not increase the amount of visible light emitted.
Equation C shows a decrease of 75% per layer added, which is too drastic and would result in very low lumens after just a few layers.
Finally, Equation D shows a decrease of 25% per layer added, which is a reasonable amount and aligns with our common sense understanding of how screen layers impact the amount of visible light emitted.
Therefore, the correct equation is D: L = 750(0.75)ˣ.
This equation shows how the lumens decrease by 25% per layer added, which is a reasonable and expected amount.
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Sharla wanted to know how many minutes per hour a radio station typically plays music. She collected the following data from
stations,
Radio Station Music
36
30 31 32 33 34 35
Minutes per Hour
By how many minutes would her median time change if she added another radio station playing 37 minutes?
O A.
0. 45
OB.
0. 5
OC.
the median did not change
OD.
0. 4
Median time change in 0.5 minutes if she added another radio station playing 37 minutes
To determine how many minutes the median time would change after adding a radio station playing 37 minutes of music per hour, follow these steps:
1. Arrange the given data in ascending order:
30, 31, 32, 33, 34, 35, 36
2. Find the median of the original data:
There are 7 data points, so the median is the middle value: 33 minutes.
3. Add the new radio station data (37 minutes) and arrange in ascending order:
30, 31, 32, 33, 34, 35, 36, 37
4. Find the new median after adding the radio station:
There are now 8 data points, so the median is the average of the two middle values (32 and 33): (32 + 33) / 2 = 32.5 minutes.
5. Determine the change in the median:
New median (32.5) - Original median (33) = -0.5
So, by adding another radio station playing 37 minutes of music per hour, her median time would change by -0.5 minutes (or decrease by 0.5 minutes). The correct answer is B. 0.5 minutes.
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For the function f(x) = 2x^4 In x, find f'(x).
To find the derivative (f'(x)) of the function f(x) = 2x^4 In x, we will need to use the product rule and the chain rule of differentiation.
Using the product rule, we have:
f'(x) = [2(In x)](4x^3) + [2x^4](1/x)
Simplifying this expression, we get:
f'(x) = 8x^3 In x + 2x^3
Therefore, the derivative of f(x) is f'(x) = 8x^3 In x + 2x^3.
Hi! To find the derivative f'(x) of the function f(x) = 2x^4 * ln(x), we'll use the product rule. The product rule states that if you have a function h(x) = u(x)v(x), then h'(x) = u'(x)v(x) + u(x)v'(x). In this case, u(x) = 2x^4 and v(x) = ln(x).
First, find the derivatives of u(x) and v(x):
u'(x) = d(2x^4)/dx = 8x^3
v'(x) = d(ln(x))/dx = 1/x
Now, apply the product rule:
f'(x) = u'(x)v(x) + u(x)v'(x)
f'(x) = (8x^3)(ln(x)) + (2x^4)(1/x)
Simplify the expression:
f'(x) = 8x^3 * ln(x) + 2x^3
This is the derivative of the given function.
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In QRS, the measure of angle S=90°, the measure of angle Q=6°, and RS = 20 feet. Find the
length of SQ to the nearest tenth of a foot.
R
20
6°
s
Q
X
The length of SQ in triangle QRS is approximately 19.8 feet to the nearest tenth of a foot.
To find the length of SQ in triangle QRS, where angle S = 90°, angle Q = 6°, and RS = 20 feet, we can use the sine function. Here's a step-by-step explanation:
1. Identify the given information: In triangle QRS, we have angle S = 90°, angle Q = 6°, and side RS = 20 feet.
2. Since the sum of angles in a triangle is always 180°, we can find angle R: angle R = 180° - angle S - angle Q = 180° - 90° - 6° = 84°.
3. Now we can use the sine function to find the length of side SQ. Since we know angle R and side RS, we can use the sine of angle R to relate side SQ to side RS:
[tex]sin(angle R) = \frac{opposite side (SQ)}{ hypotenuse side (RS)}[/tex]
[tex]sin(84°) =\frac{SQ}{20 feet}[/tex]
4. Solve for SQ: [tex]SQ = (20 feet) sin(84°) = 19.8 feet.[/tex].
So, the length of SQ in triangle QRS is approximately 19.8 feet to the nearest tenth of a foot.
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A professor of political science wants to predict the outcome of a school board election. Three candidates Ivy (I), Bahrn (B), and Smith (S), are running for one position. There are three categories of voters: Left (L), Center (C), Right (R). The candidates are judged based on three factors: educational experience (E ), stand on issues (S), and personal character (P ). The following are the comparison matrices for the hierarchy of left, center, and right. 2 3 2 3 1 2 AHP was then used to reduce these matrices to the following relative weights eft Center Right Candidate Ivy Smith. 2 Bahr. 5. 1. 2 4. 45 33 4. 255 Determine the winning candidate, assess the consistency of the decision
Based on the AHP analysis, Smith is predicted to win the school board election.
What is consistency ratio?This inconsistency is measured by the consistency ratio. It serves as a gauge for how much consistency you depart from. When your tastes are 100 percent constant, the deviation will be 0.
To determine the winning candidate, we need to calculate the overall weighted score for each candidate by multiplying their scores in each factor by the corresponding weight and adding up the results. The candidate with the highest overall weighted score is the predicted winner.
Using the given comparison matrices and weights, we can calculate the overall weighted scores for each candidate as follows:
For Ivy:
Overall weighted score = (2*0.33) + (3*0.45) + (2*0.22) = 2.06
For Bahrn:
Overall weighted score = (5*0.33) + (1*0.45) + (2*0.22) = 2.01
For Smith:
Overall weighted score = (2*0.33) + (4*0.45) + (3*0.22) = 2.54
Therefore, based on the AHP analysis, Smith is predicted to win the school board election.
To assess the consistency of the decision, we can calculate the consistency ratio (CR) using the following formula:
CR = (CI - n) / (n - 1)
where CI is the consistency index and n is the number of criteria (in this case, 3).
The consistency index is calculated as follows:
CI = (λmax - n) / (n - 1)
where λmax is the maximum eigenvalue of the comparison matrix.
For the left comparison matrix, the eigenvalue is 3.08, for the center comparison matrix, the eigenvalue is 3.00, and for the right comparison matrix, the eigenvalue is 2.92. The average of these eigenvalues is 2.97.
Therefore, CI = (2.97 - 3) / (3 - 1) = -0.015
The random index (RI) for n=3 is 0.58.
Therefore, CR = (-0.015 - 3) / (3 - 1) = -1.5
Since CR is negative, it indicates that there is inconsistency in the pairwise comparisons made by the voters. This suggests that the AHP analysis may not be a reliable method for predicting the election outcome in this case.
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Students in Mr. Jeffer’s class write down how many hours each student studies math per week. The results are 3, 4, 4, 3, 5, 4, 6, 3, 2, 2, 4, 6, 5, 7, 5, 3, 3, 4, and 5. Which box plot represents these data?
The box plot that represents these data is Option B because the centre of measure falls on 4.
What is the median study hours for Mr. Jeffer’s math class?To find the median, we first arrange the study hours in ascending order:
2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 7.
From here, we have 15 numbers, so the median is the 8th number in the list which is 4.
As the median study hours for Mr. Jeffer's math class is 4 hours per week, then, the box plot that represents these data is B because the centre of measure falls on 4.
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Store A's profit is modeled by f(x) =2x, and Store B's profit is modeled by g(x) = 83x. Over what interval is Store A's profit greater than Store B's?
Over (-∞, 0) interval is Store A's profit greater than Store B's.
To determine the interval over which Store A's profit is greater than Store B's, we need to solve the inequality:
f(x) > g(x)
Substituting the given profit functions, we have:
2x > 83x
Simplifying this inequality, we can subtract 83x from both sides:
-81x > 0
Dividing both sides by -81 (and reversing the inequality because we are dividing by a negative number), we get:
x < 0
Therefore, Store A's profit is greater than Store B's for all values of x less than 0. In interval notation, we can write:
(-∞, 0)
So the interval over which Store A's profit is greater than Store B's is the open interval from negative infinity to 0.
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What is the approximate distance between the points (–9, –9) and (1, 3)?
Answer: 15.6 units
Step-by-step explanation:
In the united states, the number of children under age 18 per family is skewed right with a mean of 1.9 children and a standard deviation of 1.1 children.
analyst 1 wants to calculate the probability that a randomly selected family from the united states has at least 2 children.
analyst 2 wants to calculate the probability that if 40 families from the united states are randomly selected, the mean number of children per family is at least 2 children.
what sample size does analyst 1 plan to use?
enter an integer. what sample size does analyst 2 plan to use?
enter an integer.
The probability of a randomly selected family from the United States having at least 2 children is 0.2734. The probability that if 40 families from the United States are randomly selected, the mean number of children per family is at least 2 children is 0.1884. Analyst 1 plans to use a sample size of 1 and analyst 2 plans to use a sample size of 40.
Analyst 1 wants to calculate the probability that a randomly selected family from the United States has at least 2 children. Since the number of children under age 18 per family is skewed right with a mean of 1.9 children and a standard deviation of 1.1 children, we can use the normal distribution to solve this problem.
To calculate the probability of a randomly selected family having at least 2 children, we need to find the area under the normal curve to the right of 2.
Using a standard normal distribution table or calculator, we can find that the area to the right of 2 is approximately 0.2734. Therefore, the probability of a randomly selected family from the United States having at least 2 children is 0.2734.
Analyst 2 wants to calculate the probability that if 40 families from the United States are randomly selected, the mean number of children per family is at least 2 children. Since we know that the mean number of children per family in the population is 1.9 children and the standard deviation is 1.1 children, we can use the central limit theorem to approximate the sampling distribution of the sample means.
The central limit theorem tells us that the sampling distribution of the sample means will be approximately normal with a mean of 1.9 children and a standard error of the mean equal to the population standard deviation divided by the square root of the sample size.
We want to find the probability that the mean number of children per family is at least 2, so we need to standardize the sample mean using the formula:
z = (sample mean - population mean) / (standard error of the mean)
Plugging in the values, we get:
z = (2 - 1.9) / (1.1 / sqrt(40)) = 0.889
Using a standard normal distribution table or calculator, we can find that the area to the right of 0.889 is approximately 0.1884. Therefore, the probability that if 40 families from the United States are randomly selected, the mean number of children per family is at least 2 children is 0.1884.
So, analyst 1 plans to use a sample size of 1 and analyst 2 plans to use a sample size of 40.
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Town officials want to estimate the number of households that own a dog. Answer the following.
There are 300 households in the town.
Estimate how many households that own a dog
__ households
The estimated number of households that own a dog in the town is 120 households.
To estimate the number of households that own a dog in the town with 300 households, you will need to follow these steps:
1. Collect a random sample of households from the town. The sample size should be large enough to be representative of the entire population.
2. Determine the proportion of sampled households that own a dog.
3. Multiply the proportion of dog-owning households in the sample by the total number of households in the town (300).
For example, let's say you collected data from 50 households and found that 20 of them owned a dog. The proportion of dog-owning households would be 20/50 = 0.4 (40%).
To estimate the total number of households that own a dog in the town, multiply 0.4 by 300:
0.4 * 300 = 120 households
So, the estimated number of households that own a dog in the town is 120 households.
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