PROC CAPABILITY: Summary of Theoretical Distributions

The CAPABILITY Procedure

Summary of Theoretical Distributions

You can use the QQPLOT statement to request Q-Q plots based on the theoretical distributions summarized in the following table:

Table 5.71 QQPLOT Statement Distribution Options
Distribution	Density Function $\text{[math]}$	Range	Location	Scale	Shape
			Parameters
Beta	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$ , $\text{[math]}$
Exponential	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$
Gamma	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$
Lognormal	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$
(3-parameter)
Normal	$\text{[math]}$	all $\text{[math]}$	$\text{[math]}$	$\text{[math]}$
Weibull	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$
(3-parameter)
Weibull	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$	$\text{[math]}$
(2-parameter)			(known)

You can request these distributions with the BETA, EXPONENTIAL, GAMMA, LOGNORMAL, NORMAL, WEIBULL, and WEIBULL2 options, respectively. If you do not specify a distribution option, a normal Q-Q plot is created.

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