Question

find the class size if the class mark of the frequency distribution are 6,10,14,18,22,26and30

Answer 1

Solution :

Class size( h )

= Difference of any two

consecutive class marks

= 10 - 6

h = 4

i ) Lower limit = xi - h/2

= 6 - 4/2

= 6 - 2

= 4

Upper limit = xi + h/2

= 6 + 4/2

= 6 + 2

= 8

Therefore ,

4 - 8 ,

8 - 12

12 - 16

16 - 20

20 - 24

24 - 28

28 - 32

••••

class Interval