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Question
The number of members in the 40 families in Bhilar are as follows:
1, 6, 5, 4, 3, 2, 7, 2, 3, 4, 5, 6, 4, 6, 2, 3, 2, 1, 4, 5, 6, 7, 3, 4, 5, 2, 4, 3, 2, 3, 5, 5, 4, 6, 2, 3, 5, 6, 4, 2. Prepare a frequency table and find the mean of members of 40 families.
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Solution
| Number of members `bb((x_i))` | Number of families `bb((f_i))` | `bb(f_ix_i)` |
| 1 | 2 | 2 |
| 2 | 8 | 16 |
| 3 | 7 | 21 |
| 4 | 8 | 32 |
| 5 | 7 | 35 |
| 6 | 6 | 36 |
| 7 | 2 | 14 |
| N = 40 | = 156 |
Since mean =
= `156/40`
= 3.9
So, the mean of members of 40 families is 3.9.
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