Question

2012 housing prices (thousands of dollars)
what is the approximate range of the middle 50% of prices?
o between $320,000 and $850,000
o between $320,000 and $490,000
o between $430,000 and $580,000
o between $490,000 and $850,000

Explanation:

Step1: Recall box - and - whisker plot property

The box in a box - and - whisker plot represents the middle 50% of the data. The left - hand side of the box is the first quartile ($Q_1$) and the right - hand side is the third quartile ($Q_3$).

Step2: Estimate quartile values from the plot

Looking at the box - and - whisker plot, the left side of the box is around 430 (in thousands of dollars) and the right side of the box is around 580 (in thousands of dollars).

Answer:

C. between $430,000 and $580,000