We are told that twelve hundred ( 1 200)student heights were measured .
we want to find out how many students measured less than 61.95 inches.
The histogram shows that about 0.05 relative frequency corresponds with 61.95 inches .
In this way : 0.05 of 1200 students measured less than 61.95 inches .
0.05 x 1200 = 60
This means 60 students measued less than 61.95 inches.
