Box plots > Box plot in Minitab

A boxplot is a way to show graphically some basic information about a set of data. Boxplots include a central box, which contains the interquartile range, and “whiskers” that represent the first quartile and the fourth quartile of the data set. The median is shown as a line through the center of the box and the ends of the whiskers correspond to the minimum and maximum in the data set. Thanks to Minitab’s easy-to-use graph creation software, you can make a box plot in Minitab in a couple of clicks. Watch this video on how to make a box plot in Minitab, or you can follow the steps below.

## How to make a box plot in Minitab

Step 1: **Type your data into columns **in a Minitab worksheet. Typically, you’ll want to type in two columns of data, one categorical and one quantitative (numerical).

Step 2: **Click “Graph” **on the toolbar and then click “Boxplot.”

Step 3: **Choose a type of boxplot. **If your data is in the form of column of quantitative data and one column of categorical variables (the most common scenario) then choose “One y” “With groups”.

Step 4: **Click a variable name** for your quantitative/numerical data and then click “Select” to move the item to the Graph Variables box.

Step 5: **Click a variable name** for your categorical data and then click “Select” to move that item to the Categorical Variables box.

Step 4: **Click “OK” **to create a boxplot.

*That’s it!*

Tips: Mouse over one of the boxes to display a window showing the median, Q1, Q3 and the IQR. You can also click on a number to bring up the Edit Scale box to specify labels, scales and other attributes for the boxplot.

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