Solution: Clearly, the outlier in the chart above is 50. The resulting box plot from the monthly sales data can be found below.Ĭonfirm the validity of your answer by solving it using the required formula.
![interpreting a box and whisker plot interpreting a box and whisker plot](https://www.dummies.com/wp-content/uploads/352336.image0.jpg)
The five-number summary for Bryan’s sales is 3, 19, 32, 55, 65. Here are six numbers above the median, namely: 34, 42, 54, 56, 61, 65. There are six numbers below the median, namely: 3, 16, 17, 21, 23, 30.
![interpreting a box and whisker plot interpreting a box and whisker plot](https://miro.medium.com/proxy/1*ghJQrcLZXGWxDPzppLWULA.png)
![interpreting a box and whisker plot interpreting a box and whisker plot](http://i.ytimg.com/vi/6D7aszsDJCg/maxresdefault.jpg)
![interpreting a box and whisker plot interpreting a box and whisker plot](https://blog.bioturing.com/wp-content/uploads/2018/05/BioVinci-box-and-whisker-plot.png)
It may also have line extensions extending from the boxes, which usually indicates variability beyond the upper and lower quartiles. Box Plot DefinitionĪ box plot is a statistical data visualization technique that uses rectangular bars to indicate data groups through their quartiles. There are different steps involved in this process, and it will be further explained in the rest of this article. Box & Whisker plots make use of the five-way summary (median, lower quartile, higher quartile, minimum, and maximum) when describing data. Some other methods that require calculation include a histogram, which needs a class interval and a pie chart that requires one to calculate the degree of each slice in the pie.Ĭomputations are no doubt a common occurrence in statistical analysis, but minimal when visualizing data. Box & Whisker plot is one of the few data visualization techniques that perform further computations on the dataset before it can be visualized.