You are given the sample mean and

Salma A 2022-04-27

You are given the sample mean and the population standard deviation. Use this information to construct the​ 90% and​ 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals.

From a random sample of 69 ​dates, the mean record high daily temperature in a certain city has a mean of 86.78°F. Assume the population standard deviation is

14.80°F.

 

The​ 90% confidence interval is

 

The​ 95% confidence interval is

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