xi | 5 | 7 | 9 | 10 | 12 | 15 |
fi | 8 | 6 | 2 | 2 | 2 | 6 |
Answer:
xi | fi | Cumulative Frequency (xifi) | |di| = |xi – Mean| | fi |di| |
5 | 8 | 40 | 4 | 32 |
7 | 6 | 42 | 2 | 12 |
9 | 2 | 18 | 0 | 0 |
10 | 2 | 20 | 1 | 2 |
12 | 2 | 24 | 3 | 6 |
15 | 6 | 90 | 6 | 36 |
Total = 26 | Total = 234 | Total = 88 |
= 234/26
= 9
= 88/26
= 3.3
∴ The mean deviation is 3.3