Steps for calculating the variance by hand
- Step 1: Find the mean.
- Step 2: Find each score's deviation from the mean.
- Step 3: Square each deviation from the mean.
- Step 4: Find the sum of squares.
- Step 5: Divide the sum of squares by n – 1 or N.
What Are the Steps to Calculate Variance? · Calculate the mean of the data. · Find each data point's difference from the mean value. · Square each of these values. |
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