Question

For the next three (03) items that follow :
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

What is the median of the distribution ?

• A. $3.5$
• B. $4$
• C. $4.5$
• D. $5$

Answer 1

The correct option is A $3.5$

Here the No.of calls are $0,1,2,3,4,5,6,7$

First we should Place the data in ascending order (smallest to highest).

Here it is already in ascending order,

Now Add the two middle numbers and then divide by two, to get the average

$\frac{(3+4)}{2}=3.5$

Hence The median is $\mathrm{3.5.}$