Question

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

Explanation:

Step1: Recall Measures of Center

Measures of center are mean, median, mode. Range is a measure of spread, so eliminate "range".

Step2: Analyze Box - Plot (Center)

In a box - plot, the line inside the box represents the median. The median is a resistant measure of center (unaffected by skewness/outliers), and box - plots are used to show median - based summaries. Mean is affected by skewness, and mode is the most frequent value (not shown by box - plot's center line). So the median best represents the center here.

Answer:

B. median