##### I need help with a statistics problem

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A sample of 25 adult elephants had an average weight of 9,500 pounds, with a sample standard deviation of 150 pounds. Find the 99% confidence interval of the true mean. Assume that the variable is normally distributed.

Nov 6th, 2015

Given the mean weight ,m=9500

Critical value for the 99% confidence interval is z= 2.58.

We have the standard deviation ,d=150

So the formula for the confidence interval is

Lower limit is 9416

Upper limit =9584

Nov 6th, 2015

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Nov 6th, 2015
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Nov 6th, 2015
Jun 23rd, 2017
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