A scientist simulates chance outcomes by randomly re-sorting treatment groups one hundred times and constructing a distribution of the response variable means for each treatment group. What can the scientist predict about the means of the treatment group distributions?(1 point)

Question

Responses

The means of the treatment group distributions will be very close to each other and close to the mean of the entire population.
The means of the treatment group distributions will be very close to each other and close to the mean of the entire population.

The means of the treatment group distributions will be very different from the response variable mean of the entire population.
The means of the treatment group distributions will be very different from the response variable mean of the entire population.

The means of the treatment group distributions will be very different.
The means of the treatment group distributions will be very different.

The means of the treatment group distributions will be exactly the same.
The means of the treatment group distributions will be exactly the same.

Answer 1

The means of the treatment group distributions will be very close to each other and close to the mean of the entire population.

Answer 2

The scores for an online exam for a class of 30 students were randomly split into two groups of equal size, Group A and Group B. Group A had a mean score of 91%. It was then found that the entire class had a mean score of 88%. What can be said about the mean score for Group B?(1 point)
Responses

The mean score for Group B will be the same as the mean score for Group A.
The mean score for Group B will be the same as the mean score for Group A.

The mean score for Group B will be lower than the mean score for the entire class.
The mean score for Group B will be lower than the mean score for the entire class.

The mean score for Group B will be equal to the mean score for the entire class.
The mean score for Group B will be equal to the mean score for the entire class.

The mean score for Group B will be higher than the mean score for the entire class.

Answer 3

The mean score for Group B will be higher than the mean score for the entire class.

Answer 4

The range of response variable measures for a treatment group sampled from a population equals 8. Which of the following could represent the range of response variable measures for the population?(1 point)
Responses

12
12

8
8

6
6

2

Answer 5

12

Answer 6

If the members of the group {73,49,32,84,39,63,22,12} were randomly assigned to two groups, then each group’s range would need to be less than what value?(1 point)
Responses

72
72

46.75
46.75

61
61

44

Answer 7

46.75

Answer 8

If the members of the group {94,37,19,48,93,36,22,23} were randomly assigned to two groups, around what value would each group’s mean be symmetrical?(1 point)
Responses

71
71

94
94

46.75
46.75

46.5

Answer 9

46.5