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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 9 randomly selected students are 61, 72, 63, 68, 69, 74, 65, 72 and 72

x =

Margin of error at 99%

confidence level =

99%

confidence interval =

[smaller value, larger value]

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