Question

The Class Marks of a distribution are 47 , 52 , 57 , 62 , 67 , 72 , 77 , 82 , 87 , 92 , 97 , 102 . Determine the class interval corresponding to 72

Answer 1

Answer:

Class gaps are, h=52−47=5

⇒ If class marks are represented by x

i

then class intervals would be

(x

1

−

2

x

,x

1

+

2

x

),(x

2

−

2

x

,x

2

+

2

x

)

=(44.5,49.5),(49.5,54.4),(54.5,59.5),....

with class size x=5.