Distribution Fitting

What distribution models my data the best?

Gamma?

Normal?

Exponential?

Lognormal?

Something else?

distribution fitting

Watch a Quick Video Highlighting Our Distribution Fitting Capabilities

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Distribution Fitting and SPC for Excel

Sometimes you are not sure what type of distribution your data follows.  Our SPC for Excel software makes it easy to fit distributions.  The software includes 14 distributions that can be fitted to your data:

Exponential

Exponential - Two Parameter

Gamma

Gamma - Three Parameter

Largest Extreme Value

Logistic

LogLogistic

LogLogistic - Three Parameter

LogNormal

LogNormal - Three Parameter

Normal

Smallest Extreme Value

Weibull

Weibull - Three Parameter

Distribution Fitting Features

Individual Distribution Pages

Best-fit parameter estimations

Empirical (data) histogram plotted versus model probability density function

P-P plot (empirical continuous distribution function vs theoretical continuous distribution function)

Summary Page

Models rated by AIC (Akaike information criterion)

Anderson-Darling statistics (with p value) and LRT (likelihood ratio test) for goodness of fit

Shape, location, scale and threshold

Easy to navigate from summary page to individual distribution