It is often used in explanatory data analysis. This type of graph is used to show the shape of the distribution, its central value, and its variability. In a box and whisper plot, the ends of the box are the upper and lower quartiles, so the box spans the interquartile range.
We all watch the weather forecast. Have you ever thought on how they get that information? Some computer models build on statistical concepts. These computers compare prior weather forecasts with the current weather and predict the future weather.