Arial 10 = General U E $ ~ % Cell Format Paste D Conditional Format Insert Delete A A A FE lil 9 Formatting . as lable . Styles Clipboard Alignment Number Tables Cells Undo Font D4 fx A B C D E F G DO YOUI A W N - Sample Data Interval Estimate of a Population Mean: Formula Used 17 Sigma Unknown Case - WOO- CO - N Sample Size #N/A Mean #N/A Excel Online Structured Activity: Interval Estimation for the Population Mean with o Unknown Sample data from a normal population are located in the Microsoft Excel Online file below. Use the data to answer the following questions Standard Deviation #N/A for the o unknown case. 13 Confidence Coefficient 0.95 Level of Significance #N/A X 10 #N/A Open spreadsheet 11 Margin of Error . The point estimate of the population mean is (to 2 decimals) 12 Point Estimate #N/A 13 #N/A 14 C.I. Lower Limit 15 #N/A b. The standard deviation is (to 2 decimals) C.I. Upper Limit 16 17 . The margin of error is (to 1 decimal) 18 19 d. The 95% confidence interval is (to 1 decimal) 20 21 to 22 24 25 26 27 28 29 30 31 32 33 34 35