ctivities CHALLENGE 6.2.1: Confidence intervals for population means. ACTIVITY 389226.2543846.qx3zqy7 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 6 inches. The heights of 8 randomly selected students are 67, 71, 71, 70, 73, 65, 68 and 73. I = 69.75 Margin of error at 95% confidence level = Ex: 1.23 95% confidence interval = [Ex: 12.34 Ex: 12.34 ] [smaller value, larger value] 2. 1. Check Fe NGE 6.2.2: Relating confidence intervals to hypothesis testing (one sample). 543846 qx3zay?

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