A simple random sample is drawn from a population that is normally distributed with population standard deviation known to be 13. The sample mean is found to be 100. Standard Normal Table A. Compute the 96% confidence interval for the population mean u if the sample size is 25. Za/2 = x (round to 2 decimal places.) Standard error of the mean = x (round to 4 decimal places.) Margin of error = X (round to 2 decimal places.) A 96% CI: ( ) (round to 2 decimal places.) B. Compute the 96% confidence interval for the population mean / if the sample size is 10. Compare the results to those obtained in part A. Standard error of the mean = (round to 4 decimal places.) Margin of error = (round to 2 decimal places.) A 96% CI: ( |) (round to 2 decimal places.) Decreasing the sample size increases the margin of error. C. Compute the 91% confidence interval for the population mean u if the sample size is 25. Compare the results to those obtained in part A. Z a/2 = (round to 2 decimal places.) Standard error of the mean = (round to 4 decimal places.) Margin of error = (round to 2 decimal places.) Activate Windows A 91% CI: ( ) (round to 2 decimal places.) Go to Settings to activate Windows. Decreasing the level of confidence decreases the margin of error