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3. In year 2021, the mean and standard deviation for the quality grade point average of the first year students were 3.11 and 0.81, respectively.

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3. In year 2021, the mean and standard deviation for the quality grade point average of the first year students were 3.11 and 0.81, respectively. Assuming that the distribution is approximately normal, test the hypothesis that a random sample of 44 students with a mean of 3.22 is different from the population mean at 1% level of significance. (8 marks)

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