A skeletal box plot shows the median as a line, a box from the 1st to 3rd quartiles, and whiskers with end caps extending to the minimum and maximum. Optional notches in the box represent the confidence interval around the median.
An outlier box plot is a variation of the skeletal box plot, but instead of extending to the minimum and maximum, the whiskers extend to the furthest observation within 1.5 x IQR from the quartiles. Possible near outliers (orange plus symbol) are identified as observations further than 1.5 x IQR from the quartiles, and possible far outliers (red asterisk symbol) as observations further than 3.0 x IQR from the quartiles. You should investigate each possible outlier before deciding whether to exclude it, as even in normally distributed data, an outlier box plot identifies approximately 0.7% of observations as possible outliers.
A quantile box plot is a variation on the skeletal box plot and shows the whiskers extending to specific quantiles rather than the minimum and maximum value.
From the Statistical Reference Guide for Analyse-it 6.24.0: https://analyse-it.com/docs/user-guide/distribution/continuous/box-plot
We use essential cookies to run the site. With your permission we'd also like to use analytics and
advertising cookies to see how visitors find and use Analyse-it, so we can keep improving it and reach
more people like you.
You can change your mind at any time, see our
Privacy policy.