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Likurg_2 [28]
3 years ago
6

A study attempts to compare two sunscreens. Each of 50 subjects with varying skin complexions will use both sunscreens—Screen A

on one side of his or her body and Screen B on the other side. For each subject, a coin is tossed in order to determine which side receives Screen A and which receives Screen B. Researchers measure the amount of ultraviolet light exposure over both treated areas for each subject. This is an example of:
A. the placebo effect.B. a stratified analysis.C. a double-blind observational study.D. a matched pairs experiment.
Mathematics
1 answer:
OverLord2011 [107]3 years ago
8 0

Answer:

D. a matched pairs experiment.

Step-by-step explanation:

A matched pairs experiment can be designed when there are only two possible treatment conditions (Screen A and Screen B) within an experiment and the subjects can be accordingly grouped into pairs (Both sides of the body of a same person, since both sides present the same skin complexion). Within each pair (both sides of the subject's body), subjects are randomly assigned (coin toss) to different treatments.

Therefore, this experiment is an example of a matched pairs experiment.

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What is the slope of the line that passes through the points (2, 3) and (8, 6)
nadezda [96]

Answer:

The slope of the line that passes through the points (2, 3) and (8, 6) is \frac{1}{2}.

Step-by-step explanation:

To find the slope of two points, divide the difference between the y values by the difference between x values, you can remember this by the mnenomic "rise over run". In this case, the difference between y and x values would be 6 - 3 = 3 and 8 - 2 = 6 respectively. This means the slope between the two points (2, 3) and (8, 6) is \frac{3}{6} or \frac{1}{2}.

3 0
2 years ago
The volume of a sphere is 36 cubic inches. What is the radius of the sphere?
Serjik [45]

Answer:

2.05 inches

Step-by-step explanation:

V = 4/3 x πr³

36=4πr³/3

36x3= 4πr³

108= 4πr³

108/4 = πr³

27= πr^3

27/π =r³

r=

\sqrt[3]{27 \div \pi}

r= 2.048in

round off to 2.05in

<u>PROOF</u>

V = 4÷3 x πr³

V= 4/3 x π(2.05)³

V=4/3 x π8.6

V=4×π×8.6/3

V=108/3

V=36in³

Therefore: radius= <u>2.05 inches</u>

8 0
2 years ago
Three students found the mean of the data set given. Their work is shown below. Choose the student who correctly found the mean.
Mars2501 [29]

Answer:

a.....Naeem's work

Step-by-step explanation:

i just took the the test i got it right

5 0
3 years ago
Read 2 more answers
Can u guys pls help me on this question and pls explain how u got the answer
Lady_Fox [76]

Answer:

55.75

Step-by-step explanation:

find the area of 1 side using the base and height and divide that answer by 2

5x6=30     30 divided by 2=15

all sides are equal so each side is 15

the base you do the same thing.

base is 5, height is 4.3

4.3 x 5= 21.5

divide it by 2 10.75

side 1=15

side 2= 15

side 3=15

base 1= 10.75

add all together

55.75

8 0
2 years ago
A hose fills a hot tub at a rate of 2.48 gallons per minute. How many hours will it take to fill a 269​-gallon hot​ tub?
never [62]

Answer:

1 hour 9 minutes

Step-by-step explanation:

7 0
2 years ago
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