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Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 3 inches. The

Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 3 inches. The heights of 10 randomly selected students are 63, 72, 70, 64, 72, 64, 62, 64, 67 and 60. x = Margin of error at 95% confidence level = 95% confidence interval = [

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