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December 17, 2014

Homework Help: statistics

Posted by Liz on Wednesday, June 22, 2011 at 12:40am.

A student was asked to compute the mean and standard deviation for the following sample of n _ 5 scores: 81, 87, 89, 86, and 87. To simplify the arithmetic, the student first subtracted 80 points from each score to obtain a new sample consisting of 1, 7, 9, 6, and 7. The mean and standard deviation for the new sample were then calculated to be M _ 6 and s _ 3. What are the values of the mean and standard deviation for the original sample?

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