Chapter 6: Normal Probability Distributions

Step 1 – Find the MEAN of the data set. Step 2 – Find the DEVIATION (difference) from the mean of each value in the data set. Deviation = (Data Value – Mean) Step 3 – Find the VARIANCE of the data set. Square the deviations and add them together, then divide that total by N = size of population or n – 1 = one less than sample size. ................
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