Question

the box plots show the data distributions for the number of customers who used a coupon each hour for two days of a store sale. what is the difference of the medians? 0 2 4 7

Explanation:

Step1: Identify medians from box - plots

The line inside the box of a box - plot represents the median. Assume the median of Day 1 is $m_1$ and of Day 2 is $m_2$. From the box - plots, if we estimate the values, say $m_1 = 8$ and $m_2 = 4$.

Step2: Calculate the difference of medians

The difference $\Delta m=\vert m_1 - m_2\vert$. Substituting the values, $\Delta m=\vert8 - 4\vert=4$.

Answer:

4