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 24 mortgage institutions, the mean interest rate was 3.62% and the standard deviation was 0.41% Assume the interest rates are normally distributed.
which distribution should be used to construct the confidence interval?
The 90% confidence interval is?
Interpret the results
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