We have:
Maximum distance (in km) = 32;
Minimum distance (in km) = 2
Range = Maximum value – Lowest value
= 32 – 2 = 30
Class size = 5 (given)
∴ Number of intervals = 30/5 = 6
From the above table, we observe that
5 + 11 + 11 + 9 = 36 engineers live at a distance up to 20 km from their place of work.
Only 4 engineers live at a distance of 20 km or more from their work place.