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CHALLENGE ACTIVITY 6.2.1: Confidence intervals for population means. 402268.2318278.qx3zqy7 Jump to level 1 1 Suppose the mean height in inches of all 9th grade students

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CHALLENGE ACTIVITY 6.2.1: Confidence intervals for population means. 402268.2318278.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 3 inches. The heights of 9 randomly selected students are 67, 68, 60, 64, 64, 60, 74, 65 and 67. D = EX: 12.34. Margin of error at 99% confidence level = Ex: 1.23 . 99% confidence interval = [ Ex: 12.34@) , Ex: 12.34@ ] [smaller value, larger value] - 2 Check Next

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