Hypothesis Testing
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Do students at various universities differ in how sociable they are?
Twenty-five students were randomly selected from each of three universities in a region and
were asked to report on the amount of time they spent socializing each day with
other students.
The result for University X was a mean of 5 hours and an estimated population
variance of 2 hours; for University Y, M = 4, S^2 = 1.5 ; and for University Z,M = 6, S^2 = 2.5.
What should you conclude? Use the .05 level.
(a) Use the steps of hypothesis testing,
(b) figure the effect size for the study; and
(c) explain your answers to parts (a) and (b) to someone who has never had a course in statistics.
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