Question: In a stratified random sample of students on a small campus, sample members were asked to rate, on a scale from 1 (poor) to 5

In a stratified random sample of students on a small campus, sample members were asked to rate, on a scale from 1 (poor) to 5 (excellent), opportunities for extracurricular activities. The results are shown in the accompanying table.

a. Find a 95% confidence interval for the mean rating that would be given by all freshmen and sophomores on this campus.
b. Find a 95% confidence interval for the mean rating that would be given by all juniors and seniors on this campus.
c. Find a 95% confidence interval for the mean rating that would be given by all undergraduate students on this campus.

Freshmen and Sophomores 632 50 3.12 1.04 Juniors and Seniors 529 Ni ni X, Si 50 3.37 0.86

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