This example illustrates how you can use a normal Q-Q plot to estimate the capability index Cpk. The data used here are the distance measurements provided in the "Creating a Normal Quantile-Quantile ...

Output 10.1.1: Normal Quantile-Quantile Plot of Nonnormal Data The nonlinearity of the points in indicates a departure from normality. Since the point pattern is curved with slope increasing from left ...

Bivariate qq-plots are exhibited for comparing a sample to a given population distribution (the bivariate normal), and for comparing two or more bivariate samples. The plots are based on drawing ...

The normal quantile-quantile (Q-Q) plot of residuals is a popular diagnostic tool for ordinary linear regression with normal errors. However, for some generalized linear regression models, the ...