Answer: The IQR is 5.
Explanation:
This is a box and whiskers plot. A box plot uses a box and whiskers plot uses lines to plot quartiles, medians, ranges, etc. First, let's find the median.
The median here is 12.5. The horizontal cut in the box is what represents the median. The top line represents quartile 3 and the bottom line represents quartile 1. The whiskers represent maximum and minimum values.
To find the IQR, we use a formula: Q3- Q1 (quartile 3 minus quartile 1). Our Q3 is 15, while our Q1 is 10.
15 - 10 is 5, which is our IQR.