Question

which graph type would be best suited for calculating the interquartile range for vehicle prices on a certain car lot?
a. stem - and - leaf plot
b. bar graph
c. pie graph
d. box - and - whisker plot

Explanation:

The interquartile range (IQR) is calculated as \(IQR = Q_3 - Q_1\), where \(Q_1\) is the first quartile and \(Q_3\) is the third quartile. A box - and - whisker plot shows the median, \(Q_1\), \(Q_3\), and the minimum and maximum values of a data set. So, it is the most suitable graph type for calculating the interquartile range. A stem - and - leaf plot shows individual data values but does not directly display quartiles. A bar graph is used to compare categorical data. A pie graph is used to show the proportion of different categories in a whole.

Answer:

D. box - and - whisker plot