We can use pairwise comparison if we want to compare the means between the average GPA in 8 different schools.

a.Yes

b.No

The value of t will increase as the standard deviation of difference___ and the difference between means___.

a.Increases; decreases

b.Increases; Increases

c.Decreases; decreases

d.Decreases; Increases

If the probability that you will correctly reject a false null hypothesis is 0.80 at 0.10 significance level, is__ and power is__.

a.0.10, 0.20

b.0.10, 0.80

c.0.90, 0.20

d.0.99, 0.80

If the significance level changes from 0.05 to 0.01, the power will___

a.Increase

b.Decrease

c.Stay the same

d.First increase, then decrease

Which of the following descriptions are correct?

a.Increasing sample size from 5 to 25 will increase power to a greater degree than increasing sample size from 15 to 35.

b.Increasing sample size from 60 to 80 will increase power to the same degree as increasing sample size from 200 to 220.

c.Increasing sample size from 40 to 60 will decrease power to a greater degree than increasing sample size from 60 to 80.

d.Increasing sample size from 50 to 70 will decrease power to the same degree as increasing sample size from 70 to 90.