Distribution Fitting Software & Articles

Chi-Squared Distribution

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- degrees of freedom (positive integer)


Probability Density Function (PDF)

Chi-Squared distribution PDF

Chi-Squared Distribution Fitting

EasyFit allows to automatically or manually fit the Chi-Squared distribution and 55 additional distributions to your data, compare the results, and select the best fitting model using the goodness of fit tests and interactive graphs. Watch the short video about EasyFit and get your free trial.

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Chi-Squared Distribution Graphs and Properties

EasyFit displays all graphs and properties of the Chi-Squared distribution, presenting the results in an easy to read & understand manner. EasyFit calculates statistical moments (mean, variance etc.), quantiles, tail probabilities depending on the distribution parameters you specify.

Random Numbers from the Chi-Squared Distribution

You can easily generate random numbers from the Chi-Squared distribution in a variety of ways:

  • directly from EasyFit
  • in Excel sheets using the worksheet functions provided by EasyFitXL
  • in your VBA applications using the EasyFitXL library

Excel Worksheet and VBA Functions

EasyFitXL enables you to use the following functions in your Excel sheets and VBA applications:

Function Name
ChiSqrPdf Probability Density Function
ChiSqrCdf Cumulative Distribution Function
ChiSqrHaz Hazard Function
ChiSqrInv Inverse CDF (Quantile Function)
ChiSqrRand Random Numbers
ChiSqrMean Mean
ChiSqrVar Variance
ChiSqrStdev Standard Deviation

Learn more: EasyFit Help on the Chi-Squared distribution