This enables you to obtain a diagram representing a statistical summary of the data without the disadvantage of concealing the real data. These values are plotted using a different marker in the warning color (see Format graph).Īs an option, you may select to plot all individual data points.
Box and whisker plot explained plus#
A far out value is defined as a value that is smaller than the lower quartile minus 3 times the interquartile range, or larger than the upper quartile plus 3 times the interquartile range ( outer fences).An outside value is defined as a value that is smaller than the lower quartile minus 1.5 times the interquartile range, or larger than the upper quartile plus 1.5 times the interquartile range ( inner fences).The horizontal line extends from the minimum to the maximum value, excluding outside and far out values which are displayed as separate points.
In the Box-and-whisker plot, the central box represents the values from the lower to upper quartile (25 to 75 percentile). This is the Box-and-Whisker plot for the variable Weight: You can choose between vertical and horizontal orientation of the Box-and-Whisker plot. If the data require a logarithmic transformation, then select the Logarithmic transformation option.
The dialog box for Box-and-Whisker plot is similar to the one for Summary statistics: The Box-and-Whisker plot (Tukey, 1977), or boxplot, displays a statistical summary of a variable: median, quartiles, range and possibly extreme values.įor a detailed description of a Box-and-Whisker plot, see Construction of a Box-and-Whisker plot.
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