se accompanying sample data, use Excel's formula options to find the 95% confidence interval for the on mean. Assume that the population is normally distributed and that the population standard deviation 12 e the following analysis. Do not hard code values in your calculations. Use A1:A20, E9, E10, E11, and E12 compute the confidence interval values. nce Coefficient ion Standard Deviation. 0.95 12 Size n Limit of Confidence Interval 20 0.025 0 Compute the lower limit of the confidence Interval using A1:A20, E10, E11, AND E12. Limit of Confidence Interval Compute the upper limit of the confidence Interval using A1:A20,E10, E11, E14, and E16.