x | 4 | 5 | 6 | 7 | 8 | 9 |
---|---|---|---|---|---|---|
f | 6 | 4 | 5 | 8 | 6 | 9 |
Total | 10 |
Let the Mean and Variance of five observations $ x_i $, $ i = 1, 2, 3, 4, 5 $ be 5 and 10 respectively. If three observations are $ x_1 = 1, x_2 = 3, x_3 = a $ and $ x_4 = 7, x_5 = b $ with $ a>b $, then the Variance of the observations $ n + x_n $ for $ n = 1, 2, 3, 4, 5 $ is