Question

in a frequency distribution, the mid value of a class is 15 and the class interval is 4 . The lower limit of the class is ?

Answer 1

Lowest limit =u+l/2=15 U+l=30 u-l=4 U=34 u=17 L=30-17 L=13

Answer 2

mid value=15

class interval=4

15-4/2

=30/2-4/2

=26/2

=13