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QNT Reasoning Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 6

QNT Reasoning

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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 6 inches. The heights of 7 randomly selected students are 66, 60, 69, 64, 65, 60 and 67 = Ex: 12.34 Margin of error at 95% confidence level = Ex: 1.23 95% confidence interval = [ Ex: 12.34 Ex: 12.34 1 [smaller value, larger value]

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