Using two different condence levels, a researcher constructs two confidence intervals for a population mean based on one sample taken from a normal population with known population variance 0'2 2 H139. The standard error of the mean is 5.032. The confidence intervals are: Interval 1: 87.95 s: p. s: 99.34 Interval 2: 87.15 s: p. s: l.4 1. Determine the following: a} The sample mean (1 decimal place}: HS la] The margin of error, ME [2 decimal places]: ME for Interval 1 = MEfor Interval 2 = C] c} The sample size {to the nearest integer]: a: 2. At what confidence level was each confidence interval constructed? Choose the closest. a} 1|.l'u'hat is the confidence level used in Interval 1? 39.9% 31% T6296 T3596 32.3% 92% D D O D O 0 la] I|What is the confidence level used in Interval 2? 32% 9D.9% 314% TEE-9E: 94% 83.3% D D O D D D Using two different condence levels, a researcher constructs two confidence intervals for a population mean based on a sample of size n = 15. The standard error of the mean is 4.9058. Assume the population is normallyr distributed and the population standard deviation is unknown. The confidence intervals are: Interval 1: 88.52?