Question: Question 23. I believe I am having a challenge computing the standard deviation on this one. I achieve a standard deviataion of 2.709325 with a

Question 23. I believe I am having a challenge computing the standard deviation on this one. I achieve a standard deviataion of 2.709325 with a mean of 20.26. Yet in order to achieve the correct answer I would need a standard deviation of 3.92333 or I am missing a formula for the limits, please assist.

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