b. The distribution is roughly symmetric.
This is because the shape of the boxplot resembles a bell-shaped curve, which is symmetric. The boxplot has a box that extends from 12 to 18, with a vertical line segment through the box at 16. This indicates that the median of the distribution is 16.
There are also two horizontal line segments extending from the left and right sides of the box to 0 and 20, respectively. This indicates that the distribution is roughly symmetric, with the majority of the data concentrated around the median. The symmetric shape of the distribution suggests that the data is not skewed to either side.
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