Question

The following data refer to the heights in cms. of 10 students of a class. Find range and coefficient of range of height of the students.

162 , 145 , 170 , 181 , 167

151 , 175 , 185 , 169 , 156

Answer 1

Here, x_H = 185 cm; x_L=145cm

Range of height:

R = x_H – x_L

= 185 – 145

= 40 cm

Coefficient of range = \(\frac{x_H−x_L}{x_H+x_L}\)

= \(\frac{185−145}{185+145}\)

= \(\frac{40}{330}\)

= 0.12