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Question
The mean of the following distribution is
| xi | 10 | 13 | 16 | 19 |
| fi | 2 | 5 | 7 | 6 |
Options
15.2
16
15.55
15.35
MCQ
Solution
15.55
Explanation:-
| xi | fi | fixi |
| 10 | 2 | 20 |
| 13 | 5 | 65 |
| 16 | 7 | 112 |
| 19 | 6 | 114 |
| `sumf_i=20` | `sumf_ix_i=311` |
`"Mean"=(sumf_ix_i)/(sumf_i)`
`=311/20`
= 15.55
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