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Use the standard normal distribution or the​ t-distribution to construct a 90​%confidence interval for the population...

Use the standard normal distribution or the​ t-distribution to construct a 90​%confidence interval for the population mean. Justify your decision. If neither distribution can be​ used, explain why. Interpret the results. In a random sample of 16 mortgage​ institutions, the mean interest rate was 3.52​% and the standard deviation was 0.36​%. Assume the interest rates are normally distributed.

Which distribution should be used to construct the confidence​ interval?

Math   Statistics-And-Probability   
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