Question

Find the range and coefficient of range of the following:

Age in Years	:	5-10	10-15	15-20	20-25
Frequency	:	10	15	20	5

Answer 1

Range = Largest item (L) − Smallest item (S)
= 25 − 5 = 20

$$\begin{gathered} \mathrm{Coefficient}\mathrm{of}\mathrm{Range}=\frac{L\mathit{-}S}{L+S}=\frac{25-5}{25+5} \\ =\frac{20}{30}=0.67 \end{gathered}$$