1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Reptile [31]
1 year ago
5

Select all the correct answers. a group of scientists is conducting an experiment on the effects of media on children. they rand

omly select 100 children and randomly assign each child to one of four treatment groups. each treatment group has a specific amount of screen time during a one-week time frame. the first group has no screen time, the second group has two hours of screen time, the third group has four hours of screen time, and the fourth group has six hours of screen time. after the first week, the scientists conduct the same experiment, with the same subject groups, for three more weeks so that each group experiences each of the four treatments. which statements about this study are true?
Mathematics
2 answers:
Julli [10]1 year ago
6 0

Answer:

This study uses random sampling

This study uses a control group

This study uses a repeated measures design ​

Romashka [77]1 year ago
5 0

Answer:

this study uses random sampling

this study uses a control group

this study uses a repeated measures design ​

Step-by-step explanation:

plato 2022

You might be interested in
ASAP HELP, PLEASE HELP NEED IT FOR COLLEGE SCHOLARSHIP PLEASE HELP ASAP i really need it for college scholarship help ive to sub
sweet-ann [11.9K]

Answer:

I think it might be 30pi m or 94.2 m.

Step-by-step explanation: So you are finding the perimeter of the circle. You have a radius of 15, the perimeter for a circle is C=2pir. Now we can do  C=2pi(15). The answer is 30pi or C=2 x 3.14 x 15= 94.2 Hope this helps.

3 0
2 years ago
You mix 1/2 cup of red paint for every 1/4 cup of blue paint to make 12 cups of
Serhud [2]
4 cups of blue paint and 8 cups of red paint

explanation

to pour one cup of blue paint, two cups of red paint has to be poured.
since when you add both those it adds to 3
so multiply each by 4 to get 4 cups of blue paint and 8 cups of red paint
3 0
2 years ago
The base of a cylinder has an area of 64π in2. If the height of the cylinder is 10 in., what is the total volume?
Stells [14]

Answer:

see explanation

Step-by-step explanation:

The volume (V) of a cylinder is

V = area of base × height

here area of base = 64π and height = 10, hence

V = 64π × 10 = 640π in³ ← exact value


5 0
3 years ago
Read 2 more answers
In a village the number of houses and the number of flats are in the ratio 7 : 4 the number of flats and the number of bungalows
LenaWriter [7]

Answer:

  140

Step-by-step explanation:

We can find the number of houses from ...

  # houses = (houses/flats)(flats/bungalows)(# bungalows)

  = (7/4)(8/5)(50)

  # houses = 140

4 0
3 years ago
Suppose you were to draw all possible samples of size 36 from a large population with a mean of 650 and a standard deviation of
Lady_Fox [76]

Answer:

By the Central Limit Theorem, it is approximately normal with mean 650 and standard deviation 4.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean of 650 and a standard deviation of 24.

This means that \mu = 650, \sigma = 24.

Sample of 36:

This means that n = 36, s = \frac{24}{\sqrt{36}} = 4

What is the shape of the sampling distribution you would expect to produce?

By the Central Limit Theorem, it is approximately normal with mean 650 and standard deviation 4.

7 0
2 years ago
Other questions:
  • Can someone help me out ? Don't just guess the answer :(
    8·2 answers
  • Describe the similarities and differences in the solution of 2x -7 =15 and 2x - 7 < 15
    15·1 answer
  • Evaluate the determinant for the following matrix [3 -5 / 1 1]
    6·1 answer
  • Is the answer A,B,C or D.
    5·1 answer
  • A 21-inch rope is to be cut into two pleces so that one piece is 8 inches longer than twice the other. How long is each piece, i
    14·1 answer
  • Which function has the same y-intercept as the graph below? -> 12 - 6x 1) y 2) 27+ 3y - 6 3) 6y +18​
    10·1 answer
  • Please help me immediately​
    7·1 answer
  • PLEASE HELP ME!! I WILL GIVE BRAINLIEST TO THE FIRST TO HELP ME, AS WELL AS 5 STARS AND A THANK YOU!!!!
    9·1 answer
  • HELP MEE!
    8·1 answer
  • Two circles with different radii have chords AB and CD, such that AB is congruent to CD. Are the arcs intersected by these chord
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!