Solve the following problems.

a. A repeated-measures study with a sample of n 5 16 participants produces a mean difference of MD 5 4 with a standard deviation of s 5 8.

Use a two-tailed hypothesis test with a 5 .05 to determine whether it is likely that this sample came from a population with mD 5 0.

b. Now assume that the sample mean difference is MD 5 10, and once again use a two-tailed hypothesis test with a 5 .05 to determine whether it is likely that this sample came from a population with mD 5 0.

c. Explain how the size of the sample mean difference influences the likelihood of finding a significant mean difference.