2. Subtract the mean from each Score. Square the results. X-X (X-X) f 3 8 10 4. 12 15 3. n 20 3. Multiply the results by the corresponding frequency. Add the results in the f(X- X)² column. X-X (X-X) f(X - Xy² 8. 10 4 12 15 3 n= 20 Ef(X-X = %3D 4. Compute the variance using the formula 35 X5 5 o

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