The following frequency distribution gives the monthly consumption of electricity of 64 consumers of a locality.


Monthly consumption (in units)



65 - 85



85 - 105



105 - 125



125 - 145



145 - 165



165 - 185



Number of consumers



4



5



13



20



14



8



Form a 'more than type' cumulative frequency distribution.

In a ‘less than type’ cumulative frequency distribution, lower limits of the classes are considered.

It is given by,


MONTHLY CONSUMPTION (in units)



CUMULATIVE FREQUENCY(Cf)



More than 65



60 + 4 = 64



More than 85



55 + 5 = 60



More than 105



42 + 13 = 55



More than 125



22 + 20 = 42



More than 145



8 + 14 = 22



More than 165



8



18