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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 height of 6 randomly selected students are 61,75,66,75,73 and 75

What is the Margin of error at 95% confidence level =

What does the 95% confidence interval =

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