The “fear of negative evaluation” (FNE) scores for 11 bulimic female students and 14 normal female students, first presented in Exercise 2.40 are reproduced at the bottom of the page.
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.