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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 heights of 7 randomly selected students are 75, 68, 60, 75, 69, 63, and 75.

[tex]\(\bar{x} = 69.285\)[/tex]

Margin of error at 99% confidence level = 2.576

99% confidence interval = [smaller value, larger value]

Sagot :

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