Quantile-quantile plot
= Quantile-quantile plot
{wiki=Q-Q_plot}
= Q-Q plot
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{synonym}
A quantile-quantile plot compares ordered observations with quantiles of a reference distribution, or with quantiles of another sample. Approximate linearity supports agreement up to location and scale. A regression normal <Q-Q plot> compares ordered <standardized regression residuals> with <standard normal distribution> quantiles.