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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

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 6 randomly selected students are 70, 75, 74, 68, 64 and 62.

Margind of error at 95% confidence level=

95% confidence interval =

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