Distribution Fitting Software & Articles

# Exponential Distribution

EasyFit: select the best fitting distribution and use it to make better decisions. learn more

The Exponential distribution is used to model Poisson processes, which are situations in which an object initially in state A can change to state B with constant probability per unit time lambda. The time at which the state actually changes is described by an exponential random variable with parameter lambda.

### Parameters

- inverse scale parameter ()

## Exponential Distribution Fitting

EasyFit allows to automatically or manually fit the Exponential 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.

## Exponential Distribution Graphs and Properties

EasyFit displays all graphs and properties of the Exponential 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 Exponential Distribution

You can easily generate random numbers from the Exponential 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
Description
`ExpPdf` Probability Density Function
`ExpCdf` Cumulative Distribution Function
`ExpHaz` Hazard Function
`ExpInv` Inverse CDF (Quantile Function)
`ExpRand` Random Numbers
`ExpMean` Mean
`ExpVar` Variance
`ExpStdev` Standard Deviation