46 Eating disorders in females. The “fear of negative evaluation”

(FNE) scores for 11 bulimic female students and 14 normal female students, saved in the BULIMIA file, are reproduced at the bottom of the page. (Recall that the higher the score, the greater is the FNE.)

a. Construct a 95% confidence interval for the mean FNE score of the population of bulimic female students.

Interpret the result.

b. Construct a 95% confidence interval for the mean FNE score of the population of normal female students.

Interpret the result.

c. What assumptions are required for the intervals of parts a and b to be statistically valid? Are these assumptions reasonably satisfied? Explain.