Chapter 13.4, Problem 8PPS

(a)

To determine

To find: the percent of the years had sales that were more than $3.25 billion.

Answer to Problem 8PPS

25%

Explanation of Solution

Given information:

The yearly game sales for a popular toy manufacturer are displayed.

  

Calculation:

The given box and whisker plot shows yearly game sales for a popular toy manufacturer. It is required to know what percent of the year had sales that were more than $3.25 billion.

Locate 3.25 in the number scale of the given box and whisker plot. Note that box and whisker plot separates the data into four parts excluding outlier. The distance between minimum and lower quartile comprise 25%, lower quartile to median comprises 25%, and median to upper quartile comprises 25% and upper quartile to maximum 25%. Thus, around 25% of the year had sales that were more than $3.25% billion.

(b)

To determine

To find: the length of the box tells about the data.

Explanation of Solution

The median divides the data in the box into two unequal parts. The data between median and lower quartile are more clustered than median and upper quartile. The whiskers are of different length, that is data above the upper quartile has higher range compared to data below the lower quartile has higher range compared to data below the lower quartile. One qutiler is distinctly visable.