Answers
Answer:
try the last one on your own then check answer
Related Questions
An occupational safety officer for a large company is conducting a study to investigate back problems in office workers who use a computer for most of the workday. The study will investigate the difference in back problems for workers who stand and workers who sit. A group of 68 volunteers have agreed to participate in the nine-month study. Half the group is randomly assigned to work while standing, and the other half is assigned to work while sitting. At the end of the study, the mean number of back problems between the two groups will be calculated. The officer will use the results to estimate the difference in the mean number of back problems between those who work while standing and those who work while sitting.
Which of the following is an appropriate inference procedure for the study?
A. A one-sample tt-interval for a population mean
B. A one-sample tt-interval for a sample mean
C. A matched pairs tt-interval for a mean difference
D. A two-sample tt-interval for a difference between sample means
E. A two-sample tt-interval for a difference between population means
Answers
Answer:
C. A matched pairs tt-interval for a mean difference
Step-by-step explanation:
When the observations from two samples are paired either naturally or by design we find the difference between the two observations of each pair. Treating the differences as a random sample from a normal population with mean ud= u1-u2 and unknown standard deviation , we perform one sample t- test on them . This is called paired difference or a paired or a matched t- test.
The test statistic
t= d`/sd/√n
where d`= ∑ di/n
and sd= ∑ (di- d`)²/n-1
with υ= n-1 degrees of freedom.
For example suppose 10 young recruits are given a strenuous physical training programme by Army. Their weights are recorded before they begin and after they complete they complete the training. The two observations obtained for each recruit. i.e. before and after measurements constitute natural pairing.
Carrie is seven years older than dan in three years the sum of their ages will be 83 find the age of each man now.
Cary is ___years old while dan is ____ years old.
Does anyone know this please
Answers
Dan X-7
X+X-7+3=83
2X=83-3+7
2X=87
X=87/2
X=43.5 yes
Carrie is 43.5 yrs old
Dan is 43.5-7=35.5 yrs old
Multiply. 8.3 x 6.4 Enter your answer in the box.
Answers
Answer:
53.12
Step to Step reasoning:
8.3 x 6.4 = 53.12
if you borrow $1,200 for 3 years at an annual interest rate of 4% how much will you pay altogether
Answers
Answer:
$1,344.00
Step-by-step explanation:
A=P(1+rt)
A=1,200(1+(0.04)(0.03))
Penny makes 5 liters of applesauce. She saves 0.24 liter for dinner and puts the rest in jars. If each jar holds 0.68 liter, how many jars can she fill?
Answers
Answer:
Penny can fill eight jars.
Answer:
Penny can fill 8 jars.
Step-by-step explanation:
Step one: Multiply the divisor by a power of 10 to make it a whole number. Then, multiply the dividend by the same power of 10. Step two: Write the decimal point in the quotient above the decimal point in the new dividend. Step three: Divide!
Gavin has a board that is ten feet long. Gavin is using the board to saw off pieces of wood needed for a building project. First Gavin saws off 2/10 of the board. Next Gavin saws off 5/10 of the board. Last Gavin saws off 1/10 of the board Gavin says he has 2/10 the board left to use for another building project is Gavin correct?
Answers
Answer:
Yes he is corrct
Step-by-step explanation:
Answer:
Yes. 10-(2+5+1)=2
Step-by-step explanation:
please answer the question in the pic below :))
Answers
D hope this helps
Step-by-step explanation:
Can I have the answer
Answers
Answer:
to what?
Step-by-step explanation:
How many tiles with dimensions 14 cm and 9 cm will be needed to fit in a rectangular
region whose length and breadth are 168 cm and 72 cm respectively?
Answers
Answer:
96 tiles
Step-by-step explanation:
if the rectangular region has dimensions of 168cm by 72 cm then what you would do is multiple them to find the area (168 x 72) which would equal 12,096. then after that you would find the area of the tiles, with the given dimensions being 14cm by 9cm you would do 14 x 9, which would give you 126 sq cm. then after you have you two products, you would then divide them (12,096/126). this equation would give you the sum of 96 tiles be able to fit within the rectangular region.
All changes saved
3. Find the length of the segment indicated. Round to
the nearest tenth if necessary.
5
3
5
X
Answers
Answer:
5
Step-by-step explanation:
It’s a radius, so it’s 5.
The length of x in the circle shown will be 5 units.
What is a circle?A circle is a geometric shape that is created by drawing a point in an orbit around a fixed point while maintaining a fixed distance.
The longest line which can be drawn inside the circle will be the diameter.
Area of circle = πr² and the perimeter of circle = 2πr where r is the radius of the circle.
Given the circle with a radius of 5 units.
A radius is a line that goes from the center and touches the periphery of the circle.
Since the x line also goes from the center and touches to the periphery hence, x should be a radius.
Since the radius of a circle is always the same so
x = radius = 5
To learn more about the circle,
https://brainly.com/question/266951
#SPJ5
Can someone tell me the answer
Answers
Steps:
The little square in the corner tells us that the angle is 90°
x + 52 = 90
x = 90 - 52
x = 38°
Check:
x + 52 = 90
52 + 38 = 90
90 = 90 ✅
If this was helpful and correct I would appreciate the brainliest! :)
Pls help i will put brainlyist if you don’t answer correctly i will report
Answers
Answer:
23.04
Step-by-step explanation:
length×width
4.8×4.8
correct me if im wrong:)
No rush but what is the formula for finding the area of a polygon
Answers
Answer: To find the area of a regular polygon, all you have to do is follow this simple formula: area = 1/2 x perimeter x apothem.
Step-by-step explanation:
Make x the subject
3) Px=q
Answers
Answer:
x = q ÷ p
just divide all side by p
Guide
What are the zeros of the function f, where f(x) = 6x2 - 9x – 6?
Answers
Answer:
Step-by-step explanation:
Use the Pythagorean Theorem to find the zeros of 6x² - 9x - 6.
x = [9±√(9²-4(6)(-6))]/[2(6)] = [9±√225]/12 = [9±15]/12 = 2, -½
Answer:
the answer is no one knows this answer is impossible to be succeeded by the human my and should be left un noted by the
Step-by-step explanation:
in conclusion ur figure it out ur self
what times 3 equals 3/10
Answers
Answer:
1/10
Step-by-step explanation:
Divide 3/10 by 3. Remember to "keep, flip, change".
3/10 ÷ 3/1
3/10 × 1/3
Multiply across: 3/10 × 1/3 = 3/30
Simplify: 3/30 = 1/10
Giving brainliest and 30 points!!!
The table shows the balance of a money market account over time. Write a function that represents the balance in y (dollars) after t years
Answers
Answer: y = 200·1.15^t
Step-by-step explanation:
The ratio from one year to the next is 1.15, so the balance is a geometric sequence. Since t starts at zero, we can write the balance (y) after t years as
y = initial value · (common ratio)^t
y = 200·1.15^t
Which function could be represented by the graph on the
coordinate plane?
Answers
Answer:
where is the graph?
Step-by-step explanation:
Find several points that are on the graph of the function y = x^2 + 1. Plot the points in a coordinate plane.
Is this a linear function? Explain.
Answers
Answer:
Below.
Step-by-step explanation:
Plot following points.
Calculate the point by plugging in values of x into x^2 + 1
for example When x = 0, y = 0^1 + 1 = 1.
So plot plot (0, 1),
Make a table of points to plot:
x -3 -2 -1 0 1 2 3
y 10 5 2 1 2 5 10
When you plot the points you'll see the graph is U shaped.
The function is of second degree (as it contains x^2) so it wont be linear.
Thirteen less than eight times a number is - 18.
Choose the correct answer below.
A. 8x + 13 = - 18
B. 8(x - 13) = -18
C. 13x - 8 = - 18
D. 13x + 8 = - 18
E. 8x - 13 = - 18
Answers
Answer:
C
Step-by-step explanation:
13-8x =-18 with x being a random number apart from zero
Factor: -6b - 15 show work plsssss
Answers
Answer:
-3 , -3(2+5)
Step-by-step explanation:
=> here's your solution
=> we need to find the factor of ( -6b -15)
=> we need to find that number which exactly
divide both term
=> try to take common from it we get -3(2 + 5)
hope it helps
Answer:
-3(2b+5)
Step-by-step explanation:
Since -6 and -15 have -3 in common, -3 would be outside the parenthesis for distribution. Inside the parenthesis would be 2b+5 because -3 times 2b equal -6b and -3 times 5 equal -15.
Bejajsjsjjajajasnsjshsjs alot i lost my brain cells
Answers
Answer:
4.23 + 16.21 = 20.44 = C
42.3 + 1.621 = 43.921 = B
4.23 - 1.621 = 2.609 = A
42.3 - 16.21 = 26.09 = D
Step-by-step explanation:
Answer:
you did bro
Step-by-step explanation:
capacity, but only to
Holly has a hard drive that she uses to store her digital music. The hard drive has a 500-megabyte total storage
7
of the hard drive's capacity is free.
10
What amount of the hard drive in megabytes has Holly used to store her digital music?
Answers
Answer:
350
Step-by-step explanation:
Write the ratio as a fraction in simplest form, with whole numbers in the numerator and denominato 36 hr : 40hr
Answers
Answer:
Hello there! :) Well the fraction would be 36/40 but in simplest form it would be 9/10.
Step-by-step explanation:
The way you simple it down would be by 4. 36 ÷ 4 = 9 and 40 ÷ 4 = 10. I hope this helps
Answer:
9/10
Step-by-step explanation:
You would first find the GCF. 36 factors: 1, 2, 3, 4, 6, 9, 12, 18, 36. 40 factors: 1, 2, 4, 5, 8, 10, 20, 40. The GCF would be 4, so divide by 4 on both sides and you would have the ratio 9 hr.: 10 hr. If using part to whole it would be 9/10.
Hope this helps
What is (6 x 10) + 9
Answers
Answer:
(60) + 9 = 69
Step-by-step explanation:
HOPE I HELPED, IM NEW
Answer:
Since if you know your multiplication tables 10x6= 60+9=69
Step-by-step explanation:
Answer 69
helpppppppppppppppppppppppppppppppp
Answers
been a while since i did surface area
Answer:
es b la segunda B aaaaaaaaaa
circle WX = xy 2x+16, xw 7x-29 find wx
Answers
The value of WX will be; (8y³)/(7y+8).
To find the length of WX, we need to substitute the given values of x and simplify the expression:
WX = xy/(2x+16) - xw/(7x-29)
xy/(2x+16) = xw/(7x-29)
Cross-multiplying, we get:
xy(7x-29) = xw(2x+16)
Expanding both sides;
7x²y - 29xy = 2x²w + 16xw
Rearranging terms and factoring out x;
x(7xy - 2xw) = 29xy - 16xw
Solving for x, we get:
x = (29xy - 16xw)/(7xy - 2xw)
Now we can substitute this value of x into the expression for WX to find its value. use the expression WX = xy/(2x+16):
WX = xy/(2x+16)
WX = y(29xy - 16xw)/[2(7xy - 2xw) + 16]
Simplifying the denominator,
WX = y(29xy - 16xw)/[14xy - 4xw + 16]
Finally, we can substitute the given values of xw and xy to get,
WX = y(29xy - 16xw)/[14xy - 4xw + 16] = (8y³)/(7y+8)
Therefore, WX = (8y³)/(7y+8).
Learn more about chord of the circle : brainly.com/question/1654080
#SPJ1
Answer: WX = 34
Step-by-step explanation:
I need help on this
Answers
Answer:
YZ<XZ<XY
Step-by-step explanation:
The smallest side would be opposite the smallest angle. The largest side would be opposite the largest angle.
YZ<XZ<XY
Factorise the following.
Answers
Answer:
Q.1 49x²- 25y²
= (7x)² - (5y)²
= (7x+5y)(7x - 5y)
Q.2 x²y² - 64
=(xy)² - (8)²
=(xy+8)(xy - 8)
Which rule explains why these triangles are congruent?
H
F
G
AAS
SSS
SAS
ASA
These triangles cannot be
proven congruent.
Answers
Answer:
These triangles cannot be proven congruent.
