Question: Do students at various colleges differ in how sociable they are? Twenty-five

students were randomly selected from each of three colleges in a particular region

and were asked to report on the amount of time they spent socializing each

day with other students. The results for College X was a mean of 5 hours and

an estimated population variance of 2 hours; for College Y, M = 4, S 2 = 1.5;

and for College Z, M = 6, S 2 = 2.5. What should you conclude? Use the .05

level.

1. Use the steps of hypothesis testing, (b) figure the effect size for the

study; and (c) explain your answers to (a) and (b) to someone who has never

had a course in statistics.

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