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| Exercise 13.3

Question 1

The following frequency distribution gives the monthly consumption of electricity of 68 consumers of a locality. Find the median, mean and mode of the data and compare them.

Monthly consumption (in units)Number of consumers65 – 85485 – 1055105 – 12513125 – 14520145 – 16514165 – 1858185 – 2054
\begin{array}{|c|c|}

\hline
\text{Monthly consumption (in units)} & \text{Number of consumers} \\
\hline
65\text{ – }85   & 4  \\
85\text{ – }105  & 5  \\
105\text{ – }125 & 13 \\
125\text{ – }145 & 20 \\
145\text{ – }165 & 14 \\
165\text{ – }185 & 8  \\
185\text{ – }205 & 4  \\
\hline
\end{array}
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