BOX PLOTS ON EXCEL STATPLUS HOW TO

See Ranking Functions in Excel for more details about the difference between these two versions.įrom the box plot in Figure 2, we can see that the scores for Brand C tend to be higher than for the other brands and those for Brand B tend to be lower. If checked then the QUARTILE.EXC version of the 25 th and 75 th percentile is used (or QUARTILE_EXC for Excel 2007 users), while if this field is unchecked then the QUARTILE.INC (or equivalently the QUARTILE) version is used. There are two versions of this table, depending on whether or not you check or uncheck the Use exclusive version of quartile field. In particular, the meaning of each element in the box plot is described in Figure 3. The box itself is divided into two parts. For those who are interested, this table contains the information in Figure 3, as explained further in Special Charting Capabilities.įor each sample, the box plot consists of a rectangular box with one line extending upward and another extending downward (usually called whiskers). Note too that the data analysis tool also generates a table, which may be located behind the chart. The resulting chart is shown in Figure 2. Select the Box Plot option and insert A3:C13 in the Input Range. Check Headings included with the data and uncheck Use exclusive version of quartile. A dialog box will now appear as shown in Figure 4 of Descriptive Statistics Tools. To generate the box plots for these three groups, press Ctrl-m and select the Descriptive Statistics and Normality data analysis tool. Figure 1 summarizes the questionnaire scores from these groups. The 30 people are divided at random into 3 groups of 10 people each, where the first group evaluates Brand A, the second evaluates Brand B and the third evaluates Brand C.

BOX PLOTS ON EXCEL STATPLUS HOW TO

To generate a box plot, you can use the Box Plot option of the Descriptive Statistics and Normality data analysis tool found in the Real Statistics Resource Pack, as described in the following example. See also Special Charting Capabilities for how to create the box plot manually using Excel’s charting capabilities.Įxample 1: A market research company asks 30 people to evaluate three brands of tablet computers using a questionnaire.

Specifically, a box plot provides a pictorial representation of the following statistics: maximum, 75 th percentile, median (50 th percentile), mean, 25 th percentile and minimum.īox plots are especially useful when comparing samples and testing whether data is distributed symmetrically. Another way to characterize a distribution or a sample is via a box plot (aka a box and whiskers plot).

Box plots on excel statplus