Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 5 inches. The heights of 8 randomly selected students are 75, 61, 75, 61, 60, 75, 70 and 65 x¯ = _____ Margin of error at 90% confidence level = ___ 90% confidence interval = [smaller value, larger value]

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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 5 inches. The heights of 8 randomly selected students are 75, 61, 75, 61, 60, 75, 70 and 65

x¯ = _____
Margin of error at 90% confidence level = ___
90% confidence interval = [smaller value, larger value]
 
 
 
 

 

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