Question

Find the percentage difference between the number of people in the height range 159.5 cm - 169.5 cm and 169.5 cm - 179.5 cm.

Answer 1

From the graph, we can see total number of people = (6 + 9 + 7 + 5 + 2 + 1) = 30
Number of people in the height range 159.5 cm - 169.5 cm = 7

Number of people in the height range 169.5 cm - 179.5 cm = 5

Difference between height range 159.5 cm - 169.5cm and 169.5 cm – 179.5cm = 7 - 5 = 2

Percentage difference between height range 159.5 cm – 169.5 cm and 169.5 cm – 179.5 cm
= $\frac{2}{30}\times 100=6.67\%$