Determining the values of mean m

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Reference no: EM1311817

Q1) A student was asked to calculate mean and standard deviation for given sample of n = 5 81, 87, 89, 86, & 87. To simplify arithmetic, student first subtracted 80 points from each score to get a new sample consisting of 1, 7, 9, 6, & 7. Mean and standard deviation for new sample were then computed to be M = 6 and s = 3. Determine the values of mean M and standard deviation s for original sample? What occurs to mean when you subtract constant from each observation?

Q2) There are 2 various formulas or methods which can be used to compute SS.

a) Under what situation is definitional formula easy to use?

b) Under what situation is the computational formula easy to use?

Reference no: EM1311817

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