Question: A sample of 24 observations is selected from a normal population. The sample standard deviation is 4.10, and the sample mean is 16.10. a. Determine

A sample of 24 observations is selected from a normal population. The sample standard deviation is 4.10, and the sample mean is 16.10.

a. Determine the standard error of the mean. (Round the final answer to 2 decimal places.)

The standard error of the mean is 0.83 Numeric ResponseEdit Unavailable. 0.83 correct..

b. Determine the 98% confidence interval for the class grades. (Round the t-value to 3 decimal places. Round the final answers to 3 decimal places.)

The 98% confidence interval for the population mean is between 14.00 Numeric ResponseEdit Unavailable. 14.00 correct.and 21.00 Numeric ResponseEdit Unavailable. 21.00 incorrect..

c. If you wanted a narrower interval, would you increase or decrease the confidence level?

Decrease Correct

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