Question: hello can you help me solve this question please and explain how to do it ? A sample of 24 observations is selected from a

hello can you help me solve this question please and explain how to do it ?

A sample of 24 observations is selected from a normal population. The sample standard deviation is 23.50, and the sample mean is 57.

a.Determine the standard error of the mean.(Round the final answer to 4 decimal places.)

The standard error of the mean is.

b.Determine the 80% confidence interval for the population mean.(Round the final answers to 2 decimal places.)

The 80% confidence interval for the population mean is betweenand.

c.f you wanted a wider interval, would you increase or decrease the confidence level?

(Click to select)

Decrease

Increase

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