Question

The class marks in a frequency distribution are 19.5,26.5,33.5,40.5 then the class corresponding to the class mark 33.5 is ______.

Answer 1

class mark 33.5 is 30 - 37
explanation :
here h= 26.5 - 19.5 = 7

class mark 33.5 is (33.5-h/2  - 33.5 +h/2) = (33.5 -3.5  - 33.5 +3.5)
=30 - 37

Answer 2

Class mark of the class interval, 16 – 23 =

Class mark of the class interval, 23 – 20 =

Class mark of the class interval, 30 – 37 =

Class mark of the class interval, 37 – 41 =

Thus, the class corresponding to the class mark, 33.5 is

30 – 37.