Distribution parameters

To define a distribution, you need to enter the necessary parameters or have Minitab estimate them from the parameters. Use the table below to determine the necessary parameters and restrictions.

Distribution

Parameters

Minitab can estimate

Normal

Mean and standard deviation

·    mean and standard deviation

·    mean, given standard deviation

Lognormal
Smallest extreme value
Largest extreme value
Logistic
Loglogistic

Location and scale

·    location and scale

·    location, given scale

Gamma
Weibull

Shape and scale

·    shape and scale

·    scale, given shape

Exponential

Mean

·    mean

2-parameter exponential

Scale and threshold

·    scale and threshold

·    scale, given threshold

3-parameter Weibull
3-parameter gamma

Shape, scale, and threshold

·    shape, scale, and threshold

·    shape and scale, given threshold

·    scale and threshold, given shape

·    scale, given shape and threshold

3-parameter lognormal
3-parameter loglogistic

Location, scale, and threshold

·    location, scale, and threshold

·    location and scale, given threshold

·    location and threshold, given scale

·    location, given scale and threshold