Question: 22. A professor has been teaching statistics for many years. His records show that the overall mean for fi nal exam scores is 82, with

22. A professor has been teaching statistics for many years. His records show that the overall mean for fi nal exam scores is 82, with a standard deviation of 10. The professor believes that this year’s class is superior to his previous ones. The mean for fi nal exam scores for this year’s class of 65 students is 87. What do you conclude? Use 0.051 tail.

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