The distance (in km) of 40 engineers from their residence to their place of work were found as follows:

5 3 10 20 25 11 13 7 12 31
19 10 12 17 18 11 32 17 16 2
7 9 7 8 3 5 12 15 18 3
12 14 2 9 6 15 15 7 6 12

Construct a grouped frequency distribution table with class size 5 for the data given above, taking the first interval as 0–5 (5 not included). What main features do you observe from this tabular representation ?

(i)

We observe the following main features from this tabular representation:

(i) The distances (in km) from their residence to their work place of the maximum number of engineers are in the third interval, i.e., 10–15.
(ii) The distances (in km) from their residence to their work place of the minimum number of engineers are in the intervals 20–25 and 25–30 each.
(iii) The frequencies of the intervals 20–25 and 25–30 are the same. (Each = 1)