Question: For Exercises use the traditional method of hypothesis testing unless otherwise specified. Assume the assumptions have been met. Several students volunteered for an alumni phone-a-thon

For Exercises use the traditional method of hypothesis testing unless otherwise specified. Assume the assumptions have been met.

Several students volunteered for an alumni phone-a-thon to solicit alumni gifts. The number of calls made by randomly selected students from each class is listed. At α = 0.05, is there sufficient evidence to conclude a difference in means?

Freshmen 25 29 32 15 18 26 35 Sophomores 17 25 20

Freshmen 25 29 32 15 18 26 35 Sophomores 17 25 20 26 30 28 Juniors 20 24 25 30 15 18 Seniors 20 25 26 32 19 20

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