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You conduct a survey of a sample of 25 members of this year's graduating marketing class with a 3.2 GPA average. The standard deviation of the sample...

You conduct a survey of a sample of 25 members of this year's graduating marketing class with a 3.2 GPA average. 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 significantly different from the long-run average? At what alpha level would it be signigicant?

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