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# Exponential Distribution

## Parameters

- continuous inverse scale parameter ()
- continuous location parameter ( yields the one-parameter Exponential distribution)

## Worksheet and VBA Functions

The following worksheet and VBA functions are available for this distribution:

 Description VBA Functions Worksheet Functions Distribution Fitting - ``` =DistFit("Exp";Data;[Options]```1```) ``` Probability Density Function `ExpPdf(x,lambda,[gamma])` ``` =ExpPdf(lambda;[gamma]) =DistPdf("Exp(lambda;[gamma])";x) ``` Cumulative Distribution Function `ExpCdf(x,lambda,[gamma])` ``` =ExpCdf(lambda;[gamma]) =DistCdf("Exp(lambda;[gamma])";x) ``` Survival Function `ExpSurv(x,lambda,[gamma])` ``` =DistSurv("Exp(lambda;[gamma])";x) ``` Hazard Function `ExpHaz(x,lambda,[gamma])` ``` =ExpHaz(lambda;[gamma]) =DistHaz("Exp(lambda;[gamma])";x) ``` Cumulative Hazard Function `ExpCumHaz(x,lambda,[gamma])` ``` =DistCumHaz("Exp(lambda;[gamma])";x) ``` Inverse CDF (Quantile Function) `ExpInv(P,lambda,[gamma])` ``` =ExpInv(lambda;[gamma]) =DistInv("Exp(lambda;[gamma])";P) ``` Random Numbers `ExpRand(lambda,[gamma])` ``` =ExpRand(lambda;[gamma]) =DistRand("Exp(lambda;[gamma])") ``` Mode `ExpMode(lambda,[gamma])` ``` =DistMode("Exp(lambda;[gamma])") ``` Mean `ExpMean(lambda,[gamma])` ``` =ExpMean(lambda;[gamma]) =DistMean("Exp(lambda;[gamma])") ``` Variance `ExpVar(lambda,[gamma])` ``` =ExpVar(lambda;[gamma]) =DistVar("Exp(lambda;[gamma])") ``` Standard Deviation `ExpStdev(lambda,[gamma])` ``` =ExpStdev(lambda;[gamma]) =DistStdev("Exp(lambda;[gamma])") ``` Skewness `ExpSkew(lambda,[gamma])` ``` =DistSkew("Exp(lambda;[gamma])") ``` (Excess) Kurtosis `ExpKurt(lambda,[gamma])` ``` =DistKurt("Exp(lambda;[gamma])") ```

1. The `Options` parameter is optional. Possible options: "gamma=value"  (example: "gamma=0")
2. The `gamma` parameter is optional (the default value is 0).
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