Confidence interval for the average number of hours

Reference no: EM1393539

A market researcher wants to find the 99% Confidence Interval for the average number of hours people spend online each day. She obtained a small sample of 18 people and found the sample mean was 92.5 minutes with a sample standard deviation of 15.3. Find the margin of error for the 99% Confidence Interval for the population mean.

Reference no: EM1393539

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