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suppose the mean height in inches of all 9th-grade students is 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 is at one high school is estimated. The population standard deviation is 6 inches. The Height of 6 randomly selected students are 67,67,60,74,60 and 67

Margin of error at 90% confidence level =

90% confidence interval = [ ex. 12.34, ex 12.43]

smaller value, larger value

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