The following frequency distribution gives the monthly consumption of electricity of the consumers of a locality. Find the median, mean and mode of the data and compare them.

=137.06

We have, N= 68, N/2 = 34

Hence, medium class =125- 145, such that:

l = 125, f = 20, cf = 22, h = 20

=137

Here, we may observe that maximum class frequency is 20 belonging to the class interval 125-145.

So, modal class= 125-145

Lower limit, l = 125

f₀ = 13, f₂ = 14, f = 20, h = 20

=

=135.77