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 6 randomly selected students are 71, 73, 69, 72, 71 and 64.  x= Margin of error at 99%= confidence level = 99% 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 3 inches. The heights of 6 randomly selected students are 71, 73, 69, 72, 71 and 64. 

x=

Margin of error at 99%=
confidence level = 99% confidence interval = 
[smaller value, larger value]=
 
 
 
 
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