Sample data from a normal population are located in the Microsoft Excel Online file below. Use the data to answer the following questions for the o unknown case. X Open spreadsheet a. The point estimate of the population mean is (to 2 decimals) b. The standard deviation is (to 2 decimals) c. The margin of error is (to 1 decimal) d. The 95% confidence interval is (to 1 decimal) toD4 fx A B C D F Sample Data Interval Estimate of a Population Mean: Formula Used 5 Sigma Unknown Case 17 6 Sample Size #N/A 16 Mean #N/A Standard Deviation #N/A Confidence Coefficient 0.95 Level of Significance #N/A 10 11 Margin of Error #N/A 12 13 Point Estimate #N/A 14 C.I. Lower Limit #N/A 15 C.I. Upper Limit #N/A 16 17