Box and whisker plot

Question

The following box-and-whisker plots represent the average high temperatures (in °F) for two cities in the United States.

1. Determine the approximate median, range, and interquartile range for the plot representing San Diego.
2. Determine the approximate median, range, and interquartile range for the plot representing Boston.
3. Using complete sentences, make two inferences comparing the data sets.

Answer 1

In a box and whisker plot the middle line is the median, the two lines bounding the box are the 1st and 3rd quartiles. The outside brackets are the minimum and maximum values. The Interquartile range is the 3rd quartile - 1st quartile. The range is the maximum - minimum values.