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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 5 inches. The

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 7 randomly selected students are 75, 69, 60, 70, 62, 61 and 68

Margin of error at 90%

confidence level =

90%

confidence interval = [,]

[smaller value, larger value]

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