Question

Weight of 40 persons (in kg) are given as follows: 

62, 61, 65, 62, 70, 62, 70, 75, 72, 80, 90, 80, 85, 70, 62, 63, 62, 80, 90, 70, 60, 70, 70, 62, 65, 70, 65, 94, 62, 65, 72, 70, 75, 80, 85, 63, 65, 90, 80, 85

Prepare a frequency table of the above data taking 5 as the width of the class interval.

Answer 1

Minimum weight = 60 kg 

Maximum weight = 94 kg 

Range = 94 – 60 = 34 kg 

Number of class intervals with class size 5 = 34/5 = 6.8 i.e. 7.