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please show work thank you. 3. A random sample of 300 students at a university shows that these students take a mean of 16.5 credit

please show work thank you.

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3. A random sample of 300 students at a university shows that these students take a mean of 16.5 credit hours per semester with a standard deviation of 1.8 credit hours. The 99% confidence interval for the population mean is 16.5 + 0.293. Give the correct interpretation of the confidence interval

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