377222.2338710.qx3zay7 Jump to level 1 Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 5 inches. The heights of 10 randomly selected students are 65, 65, 69, 60, 66, 72, 73, 71, 69 and 65. ac = Ex: 12.34@ Margin of error at 90% confidence level = Ex: 1.23 90% confidence interval = [ Ex: 12.34 Ex: 12.34@ ] [smaller value, larger value] 1 2 Check Next Feedback? CHALLENGE ACTIVITY 6.2.2: Relating confidence intervals to hypothesis testing (one sample). 377222.2338710.qx3zay7