13 Using two different confidence levels, a researcher constructs two confidence intervals for a population mean based on a sample of size n = 22. The standard error of the mean is 6.1828. Assume the population is normally distributed and the population standard deviation is unknown. The confidence intervals are: Interval 1: 72.196 < <107.204 Interval 2: 81.52 < <97.88 1. Determine the following: a) The sample mean (1 decimal place): = b) The margin of error, ME (3 decimal places): ME for Interval 1 ME for Interval 2 = = c) The sample standard deviation (to the nearest integer): c) The sample standard deviation (to the nearest integer): S= 2. At what confidence level was each confidence interval constructed? Choose the closest. a) What confidence level was used in Interval 1? 80% 90% 95% 98% 99% O O O b) What confidence level was used in Interval 2? 80% 99% 98% 95% 90% o 00 Question Help: Video Message instructor Submit