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The number of telephone calls received in 245 successive one minute intervals at an exchange is given below in the following frequency distribution.
The number of telephone calls received in 245 successive one minute intervals at an exchange is given below in the following frequency distribution.
| Number of calls | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|
| Frequency | 14 | 21 | 25 | 43 | 51 | 40 | 39 | 12 |
[NDA I 2014]
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