Question

i) What is the percentage of people in the height range 149.5 -159.5cm?

ii) What is the percentage difference between the number of people in the height range 159.5 - 169.5cm and 169.5 - 179.5cm?

Answer 1

i) Total number of people in the height range 149.5 – 159.5 cm = 9

Total number of people = 30

Percentage of people in the height range 149.5 – 159.5 cm
= $\frac{9}{30}\times 100=30\%$

ii) Number of people in the height range 159.5-169.5 cm = 7

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

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

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