Chapter 2, Problem 1SE

a.

To determine

Find the number of morbidly obese people in the dotplot.

Answer to Problem 1SE

The number of morbidly obese people in the dotplot is 11.

Explanation of Solution

In the dotplot, 134 people according to the Survey in 2010 are plotted.

Here, BMI of more than 40 is considered as morbidly obese.

From the dotplot, 11 dots are in BMI of more than 40. Hence, the number of morbidly obese in the dotplot is 11.

b.

To determine

Find and compare the percentage of people who are morbidly obese.

Answer to Problem 1SE

The percentage of people who are morbidly obese is 8%.

Explanation of Solution

Calculation:

The percentage of people who are morbidly obese is obtained as follows:

$\begin{array}{c}\text{Percentage}=\frac{11}{134}\times 100\\ =8.21\%\\ \approx 8\%\end{array}$

Thus, the percentage of people who are morbidly obese is 8%.

Comparison:

The percentage of people who are morbidly obese is 8%, which is greater than the estimated percentage of people who are morbidly obese in Country U.