Symmetry Plot
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Stat > Quality Tools > Symmetry Plot

Symmetry plots can be used to assess whether sample data come from a symmetric distribution. Many statistical procedures assume that data come from a normal distribution. However, many procedures are robust to violations of normality, so having data from a symmetric distribution is often sufficient. Other procedures, such as nonparametric methods, assume symmetric distributions rather than normal distributions. Therefore, a symmetry plot is a useful tool in many circumstances.

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Variables: Enter the columns containing the numeric data you want to plot.

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