Power of Within-Subjects Designs Demonstration

Questions

Question 1 out of 4.

Increasing the correlation between measures:

  1. increases power.
  2. decreases power.
  3. has no effect on power.
Question 2 out of 4.

Increasing the population variance:

  1. increases power.
  2. decreases power.
  3. has no effect on power.
Question 3 out of 4.

Increasing the difference between population means:

  1. increases power.
  2. decreases power.
  3. has no effect on power.
Question 4 out of 4.

Assuming the hypothesized direction of the effect is correct, a one-tailed test is:

  1. more powerful than a two-tailed test.
  2. less powerful than a two-tailed test.
  3. has the same power as a two-tailed test.