Answers
Answer:
1) E(X) = 1.5
2)SD = 1.118
Step-by-step explanation:
1) Formula for expected value of this set of data is;
E(X) = Σx * P(x)
Σx = 0 + 1 + 2 + 3 = 6
And P(x) = ¼
Thus;
E(X) = 6 × ¼ = 1.5
2) Formula for the standard deviation is;
SD = √Σ((x - μ)²•P(x))
Where μ is the expected value = 1.5
At x = 0,we have;
(0 - 1.5)² × 1/4 = 0.5625
At x = 1, we have;
(1 - 1.5)² × 1/4 = 0.0625
At x = 2, we have;
(2 - 1.5)² × 1/4 = 0.0625
At x = 3, we have;
(3 - 1.5)² × 1/4 = 0.5625
Thus,Σ((x - μ)²•P(x)) = 0.5625 + 0.0625 + 0.0625 + 0.5625 = 1.25
Thus;
SD = √1.25
SD = 1.118
Related Questions
Help me please please ASAP I am begging someone please
Answers
Answer:
x is greater than -2
Step-by-step explanation:
If 7 : 11 :: x : 154, then x is
Answers
Answer:
98
Step-by-step explanation:
7 : 11 :: x : 154
Also,
[tex] \frac{7}{11} = \frac{x}{154} [/tex]
[tex] = > \frac{x}{154} = \frac{7}{11} [/tex]
[tex] = > x = \frac{7 \times 154}{11} [/tex]
=> x = 7 × 14
=> x = 98 (Ans)
What’s the answer???????
Answers
Answer:
21x - 28
You would multiply 7 times 3x which is 21 x and then you would multiply 7 times -4 which is -28.
Como que c faz conta de raiz quadrada?
Answers
Answer:
could u say it in english and is it a multiple chice?
Step-by-step explanation:
8w2 + 2w - 3
What is the value of the expression below when w = 2?
Answers
Answer:
33
Step-by-step explanation:
8 x 2^2 + 4 - 3= 8x4+1=33
Answer:
33
Step-by-step explanation:
8w2 + 2w - 3
w = 2
substitute w for 2:
(8 x 2 x 2) + (2 x 2) - 3
solve:
32 + 4 - 3
33
At Bike Shop X it costs $2.75 per hour plus a $3.00 deposit to rent a bike. At Bike Shop Z
it costs $1.75 per hour plus a $7 deposit to rent a bike. When would it cost less to rent a bike
from Bike Shop X? Explain.
Answers
Answer:
ok so you see that right away bike shop x is more cost than bike shop z so if you add 2.75 and 3 dollars it would cost 5.75 dollars of course the cost of 2.75 dollars is per hour so you would need to count 2.75 per hour and as you bike shop z the amount of cost per hour is 1.75 but the deposit fee is 7 dollars so the cost would be 8.75.
Step-by-step explanation:
Ok why it is lower cost because as you see each hour on shop x it is 2.75 and each hour in z shop it is 1.75 why z shop is lower because x shop have bigger cost per hour and that can add up more than z shop.
what is sum of 109 and h as an algebraic expression
Answers
Answer:
to be honest idon'tknow
Step-by-step explanation:
Which equation shows how the properties of numbers extend to negative whole numbers by the Associative Property
of Addition?
A)
-2 + 4 = 4 + (-2)
B)
-2(4) = 4(-2)
(2 + 4) + 3 = -2 + (4 + 3)
D)
-2(4 + 3) = (-2 x 4) + (-2 x 3)
Answers
Answer:
A is correct answer
ok
now make me brainliest
Determine the intercept of the line
Answers
Step-by-step explanation:
y-intercept (0,2.5)
x-intercept (3.5,0)
X (3 1/2, 0)
Persevere Write the difference in factored form. (24x4 − 15x2 + 6x) − (10x4 + 5x2 − 4x)
Answers
Answer:
ur horrid
Step-by-step explanation:
Write 2/14 in simplest form
Answers
Answer:
1/7
Step-by-step explanation:
2 ÷ 2 = 1
14 ÷ 2 = 7
1/7 is the simplest form!
Hope this helps =]
PLEASE HELPP
it isn't 62 I already tried it
Answers
Answer:
112°
Step-by-step explanation:
50 + 62 = 112
Which equation represents the relationship between x and y in the table
y = x
y = x - 4
y = x - 8
y = x/5
Answers
1. What is the distributive law for real numbers a,b,c? A(b+c)=ab+ac (a+b)c=ac+bc (a+c)b=ab+cb All of the answer choices are correct
Answers
Answer:
Step-by-step explanation:
tdasoUse the formula A = 6s2 to find the surface area of a cube
with sides of length s = 1.5 meters.
Answers
Answer:
[tex]\Large \boxed{\sf 13.5 \ m^2}[/tex]
Step-by-step explanation:
Use formula and substitute s = 1.5
[tex]A=6 \times 1.5^2[/tex]
[tex]A=13.5[/tex]
Tommy had $200 that he saved from. He started a job eight weeks ago and has been able to save $50 each week. How much total money does Tommy have after eight weeks?
Answers
Answer:
$600 after 8 weeks ($400) plus the $200
Answer:
600
Step-by-step explanation:
50x8=400
200+400=600
Last week, Lisa drove 12 meters to visit her uncle. Is it meters, centimeters, kilometers, or millimeters?
Answers
Answer:
meters
Step-by-step explanation:
judging by the fact that it says meters i'd say that's the answer. hope this helps :)
Three students wrote expressions on their dry-erase boards.
Which students wrote equivalent expressions?
Student 1 (((( Student 2 ((((( Student 3
-5r + 3s + 1 / / -(5r - 3s + 1) // -5r + 3s -1
Answers
Answer:
Student 2 and Student 3
Step-by-step explanation:
Student 2
-(5r - 3s + 1)
= - 5r +3s - 1
Student 3
= - 5r +3s - 1
help ASAP please! i'll mark brainliest if correct!
Answers
Answer:
D.
Step-by-step explanation:
First Quartile = 52
Second Quartile = 58
Third Quartile = 62
what are the values of x and y
Answers
Answer:
Y: 145
X: 35
Hope I was able to help you, have a wonderful day!
Please help i will give brainliest and thanks !!!!
A landscaping company made a purchase at a local nursery. They ordered bushes for $23 each, and trees for $79 each. The company got a total of 18 items and the total cost was $750.
How many of each item did they purchase?
Bushes:
and
Trees
Answers
Answer:
6 trees and 12 bushes
Step-by-step explanation:
6 trees will be 474
12 bushes will be 276
474+276=750
6+12=18
hope this helps
Select the correct answer.
If you roll a single six-sided die, what is the probability of rolling an odd number?
A 1/6
B 1/3
C 1/2
D 3
Please help!
Answers
Answer: that means you have a 3/6 chance which can be simplified to 1/2
1, 3 and 5 are the odd numbers
Step-by-step explanation:
Answer:
the answer is c 1/2
Step-by-step explanation:
since there are 6 numbers on the die that range from 1-6, that means there are three odd numbers, so the probability would be 3/6, which can reduce to 1/2
Gino is buying wood screws at the corner hardware store. The table shows different numbers of bags of screws and their corresponding prices.
Bags of Screws
Price ($)
2
10
4
20
7
35
According to the table, the relationship between the number of bags and the price is
Answers
Answer:
Step-by-step explanation:
Proprotional is the answer
Answer:
See image
Step-by-step explanation:
Plato
Sanjay determined that one
vertex of a figure was mapped to its image by
translating the point 2 units left and 7 units
down. What is the rule that maps the other
vertices of the figure to their images?
Answers
Answer:
T<-2, -7> (x, y)
Step-by-step explanation:
A coordinate system in geometry is a system that employs one or more integers, or coordinates, to define the position of points. The rule that maps the other vertices of the figure to their images is T<-2, -7> (x, y).
What are coordinates?A coordinate system in geometry is a system that employs one or more integers, or coordinates, to define the position of points or other geometric components on a manifold such as Euclidean space.
Given that Sanjay determined that one vertex of a figure was mapped to its image by translating the point 2 units left and 7 units down.
In order to translate coordinates, 2 units left we need to subtract 2 units from the x-coordinate of the point, while to translate the point 7 units down we need to subtract 7 from the y-coordinate of the point.
Therefore, the rule that maps the other vertices of the figure to their images is,
(x₁, y₁) = (x-2, y-7), ot it can bse written as T<-2, -7> (x, y),
where x₁ and y₁ are the coordinates of the point after translation.
Hence, the rule that maps the other vertices of the figure to their images is T<-2, -7> (x, y).
Learn more about Coordinates here:
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Evaluate −6 − (−4). (1 point)
−10
−2
24
2
Answers
Answer:
B: -2
Step-by-step explanation:
When you minus a negative number, it is like adding the absolute value of the negative value, so:
-6-(-4)
=-6+4
=-2
The answer is B: -2
Have a nice day!
PLEASEEEE WHAT IS ITTTT HURRYYY PLSSS
Answers
Answer:
It is ( - 0.25)
Step-by-step explanation:
I hope that is useful for you :)
Answer:
It would be -0.25.
Step-by-step explanation:
it is a negative if a number is less than zero.
we got the first step down.
next step,
the -0.25 part.
the fraction of one fourth in decimal is 0.25
but its negative so it will be: -0.25.
So...
I hope this helps. :)
If the shaded part of this chocolate represents $21.00 and the unshaded part represents $5.00 each, what is the value of the whole chocolate
Answers
Answer:
$26.00
ad the picture Step-by-step explanation: it would be better if i had the pictrue but t ook the unshaded plus the shaded and got $26.00
Answer:
The correct answer is $26.00
Step-by-step explanation:
$21.00
+$ 5.00
________
$26.00
Solve the triangle in the figure.
Question options:
A)
BC = 9; m∠A = 53.1°; m∠B = 6.9°; m∠C = 90°
B)
BC = 11; m∠A = 42.8°; m∠B = 47.2°; m∠C = 90°
C)
BC = 19; m∠A = 36.9°; m∠B = 53.1°; m∠C = 90°
D)
BC = 9; m∠A = 36.9°; m∠B = 53.1°; m∠C = 90°
Answers
Answer:
D)
BC = 9; m∠A = 36.9°; m∠B = 53.1°; m∠C = 90°
Step-by-step explanation:
15²-12² = 9²
BC = 9
sin B = 12/15 = 0.8
∠B = 53.1°
The solution will be BC = 9; m∠A = 36.9°; m∠B = 53.1°; m∠C = 90°. The correct option is D.
What is the Pythagorean theorem?Pythagorean theorem states that in the right angle triangle the hypotenuse square is equal to the sum of the square of the other two sides.
The triangle ABC is a right triangle. The new path is in front of the right angle, therefore it is the hypotenuse. To find the length of the hypotenuse we use the Pythagorean theorem:
H² = P² + B²
The length BC will be calculated as below:-
15²-12² = 9²
BC = 9
The angle B will be calculated as below:-
sin B = 12/15 = 0.8
∠B = 53.1°
Therefore, the solution will be BC = 9; m∠A = 36.9°; m∠B = 53.1°; m∠C = 90°. The correct option is D.
To know more about the Pythagorean theorem follow
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Calculate the angle marked with a question mark. Do not measure - the drawing is not to scale
Answers
Answer:
crbtbynynumyvscwcsbymumybrxqzwcrhy
2+1.25f=10-2.75f2+1.25f=10−2.75f solve for f pls
Answers
(please give thanks if i am correct)
Answer:
2
Step-by-step explanation:
