Mathematics
Find the mean of the following frequency distribution :
| Variate | frequency |
|---|---|
| 5 | 7 |
| 6 | 8 |
| 7 | 14 |
| 8 | 11 |
| 9 | 10 |
Measures of Central Tendency
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Answer
| Variate (x) | frequency (f) | fx |
|---|---|---|
| 5 | 7 | 35 |
| 6 | 8 | 48 |
| 7 | 14 | 98 |
| 8 | 11 | 88 |
| 9 | 10 | 90 |
| Total | ∑ f = 50 | ∑ fx = 359 |
We know that,
n = ∑f = 50.
By formula,
Mean = = 7.18
Hence, mean of the frequency distribution is 7.18.
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