Given a sample of female students, n = 7, with SS = 550, and a sample of male students, n = 10, with SS = 720:

a. Find the pooled variance for the two samples.

b. Compute the estimated standard error for the sample mean difference.

c. If the sample mean difference is 5 points, is this enough to reject the Ho for an independent-measures hypothesis test using .01, one-tailed test?

d. If the sample mean difference is 20 points, is this enough to reject the Ho for an independent-measures hypothesis test using .01, one-tailed test? e. Compute Cohen's d to measure the effect size for the 5-point difference and for the 20-point difference.

Briefly evaluate the effect size of each difference.