Question

which best represents the center of the data set below? average monthly grocery bill mean median range mode

Explanation:

In a box - and - whisker plot (which this appears to be), the line inside the box represents the median. The median is a measure of central tendency. The mean can be affected by outliers (extreme values). The range is a measure of spread (not central tendency), and the mode is the most frequently occurring value (not typically represented in a box - and - whisker plot in this context).

Answer:

median