Chapter 3.1, Problem 3.1E

(a)

To determine

To explain the 87^th percentile for weight and 67^th percentile for height.

Explanation of Solution

A percentile defines that a certain percent of data falls less than that now the 87^th percentile of weight means the girl’s weight is more than 87% of the other girls of her age or it can be said that 87% girl’s weight is less than her weight.

Similarly, 67^th percentile in height means that 67% of the other girls height is less than the her height or it can be said that her height is more that 67% of the girls of her age.

(b)

To determine

To explain the 85^th percentile of vehicle speed.

Explanation of Solution

Here, the speed limit is 85^th percentile, which means that the vehicles speed should be less that 85% of all the vehicles speed, for e.g., if 100 vehicles are going through the road then the vehicles speed should be out of the 85% of the lower speed.