Obtain the mean of the given data by assumed mean method. xi fi
25 | 3 |
35 | 5 |
45 | 4 |
55 | 6 |
65 | 8 |
75 | 10 |
85 | 9 |
25 | 3 | -30 | -90 |
35 | 5 | -20 | -100 |
45 | 4 | -10 | -40 |
A=55 | 6 | 0 | 0 |
65 | 8 | 10 | 80 |
75 | 10 | 20 | 200 |
85 | 9 | 30 | 270 |
∑fi = 18 | ∑fidi = 200 |