The number ot telephone calls received at an exchange per interval for 250 successive one-minute intervals are given in the following frequency table: No. of calls (x) : 0 1 2 3 4 5 6 No. of intervals (f) : 15 24 19 46 54 43 39 Compute the mean number of calls per interval.

The number ot telephone calls received at an exchange per interval for

1.	The number ot telephone calls received at an exchange per interval for 250 successive one-minute intervals are given in the following frequency table: No. of calls (x) : 0 1 2 3 4 5 6 No. of intervals (f) : 15 24 19 46 54 43 39 Compute the mean number of calls per interval.
Answer» The number ot telephone calls received at an exchange per interval for 250 successive one-minute intervals are given in the following frequency table: No. of calls (x) : 0 1 2 3 4 5 6 No. of intervals (f) : 15 24 19 46 54 43 39 Compute the mean number of calls per interval.

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The number ot telephone calls received at an exchange per interval for 250 successive one-minute intervals are given in the following frequency table: No. of calls (x) : 0 1 2 3 4 5 6 No. of intervals (f) : 15 24 19 46 54 43 39 Compute the mean number of calls per interval.

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