7 You conduct a survey of a sample of 25 members of this years graduating marketing students...
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7 You conduct a survey of a sample of 25 members of this year’s graduating marketing students and fi nd that the average GPA is 3.2. The standard deviation of the sample is 0.4. Over the last 10 years, the average GPA has been 3.0. Is the GPA of this year’s students signifi cantly different from the long-run average? At what alpha level would it be signifi cant?
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