The value of SS (sum of squared deviations) for the following population is _______________ Population: 1, 1, 1, 5 Fill in the blank please Solution First find the mean: Mean = (1+1+1+5)/4 = 2 Subtract the mean from each observation and square the resulting difference. Then add the differences to get SS: SS = (1-2)^2 + (1-2)^2 + (1-2)^2 + (5-2)^2 = 12.