Feedback? CHALLENGE ACTIVITY 4.7.1: Confidence intervals for population means. 402216.1927122.qx3zqy7 Jump to level 1 1 Suppose the mean height in inches of all 9th grade students at one high school is 2 estimated. The population standard deviation is 5 inches. The heights of 6 randomly selected students are 65, 67, 69, 74, 72 and 65. Ex: 12.34 4) Margin of error at 95% confidence level= Ex: 1.23 95% confidence interval = [ Ex: 12.34 Ex: 12.34 [smaller value, larger value] 1 2 Check Next Feedback