The shirt sizes worn by a group of 200 persons, who bought the shirt from a store, are as follows:

Shirt size:	37	38	39	40	41	42	43	44
Number of persons:	15	25	39	41	36	17	15	12

Find the modal shirt size worn by the group.

Given:

The shirt sizes worn by a group of 200 persons, who bought the shirt from a store, are given.

To do:

We have to find the modal shirt size worn by the group.

Solution:

The frequency of the given data is as given below:

Shirt size($x_i$):	Number of persons$(f_i$):
37	15
38	25
39	39
40	41
41	36
42	17
43	15
44	12

We observe that the shirt size of 40 has the maximum frequency(41).

Hence, the modal shirt size worn by the group is 40.