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in a frequency distribution the midpoint of a class interval is 20 and the width of the class 8. find the lower limit of the class interval.

Posted by Prerna Shrivastava 8 years, 10 months ago

CBSE > Class 09 > Mathematics

2 answers

Shweta Gulati 8 years, 10 months ago

Class mid point = Class mark = 20

Class width = Class size = 8

Lower limit of class interval = Class mark - $\frac{C l a s s s i z e}{2}$

= 20 - (8/2) = 20-4 = 16

Upper limit of class interval = Class mark + $\frac{C l a s s s i z e}{2}$

= 20 + (8/2) = 20+4 = 24

0Thank You

Naveen Sharma 8 years, 10 months ago

And. Class mid-point (a) = 20

width (h) = 8

we know,

Lower Limit = a - h/2

put given values, we get

Lower Limit = 20 - 8/2

=> Lower Limit = 20-4= 16

1Thank You

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