Using the data from Exercise 14.1, a. Delete the data for the third session and run a (matched-sample) t test between Sessions 1 and 2. b. Now run a repeated-measures analysis of variance on the two...

Using the data from Exercise 14.1,

a. Delete the data for the third session and run a (matched-sample) t test between Sessions 1 and 2.

b. Now run a repeated-measures analysis of variance on the two columns you used in part (a) and compare this F with the preceding t.

It is at least part of the folklore that repeated experience with any standardized test leads to better scores, even without any intervening study. Suppose that we obtain eight subjects and give them a standardized admissions exam every Saturday morning for 3 weeks. The data follow:

a. Write the statistical model for these data.

b. Run the analysis of variance.

c. What, if anything, would you conclude about practice effects on the GRE?