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A student was asked to calculate mean and standard deviation for following sample of n _ 5 scores: 81, 87, 89, 86, and 87. To simplify arithmetic, student first subtracted 80 points from each score to get the new sample consisting of 1, 7, 9, 6, and 7. Mean and standard deviation for new sample were then computed to be M _ 6 and s _ 3. Write down the values of mean and standard deviation for original sample?

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