Suppose the mean height in inches of all 9th grade students at one high school is estimated.
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Question:
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 heights of 9 randomly selected students are 75, 60, 66, 61, 72, 69, 67, 75 and 66.
Margin of error at 99% confidence level =
99% confidence interval = [ , ]
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