Excel EXPONDIST Function

Description

The Excel EXPONDIST function returns the exponential distribution based on the given x value and the parameter of the distribution.

Note: This function has been replaced with EXPON.DIST function that may provide improved accuracy after Excel 2010 version. This function is still can be available but considering it may be not available in the future, you should better study to use the new function from now.

Syntax and arguments

Formula syntax

Arguments

Remarks

1. The function returns #VALUE! error value if either argument x or lambda is a non-numeric value.

2. The function returns #NUM! error value if either argument x < 0 or lambda ≤ 0.

3. The equation for the probability density function is:

4. The equation for the cumulative distribution function is:

Version

Excel 2007.

Usage and Examples

Basic usage

For instance, the argument x is 2 and the argument lambda is 5, to get the relative cumulative distribution function and probability density function, please use the formula as these:

=EXPONDIST(2,5,TRUE)  //Return cumulative distribution function

=EXPONDIST(2,5,FALSE)  //Return probability density function

Press Enter key.

Other Functions:

• Excel COVARIANCE.P Function
  The Excel COVARIANCE.P function returns the population variance of two data sets which is used to determine the relationship between two data sets.

• Excel COVARIANCE.S Function
  The Excel COVARIANCE.P functionreturns the sample variance of two data sets.

• Excel EXPON.DIST Function
  EXPON.DIST function used in Excel 2010, returns the exponential distribution based on the given x value and the parameter of the distribution.

• Excel NORM.S.INV Function
  The NORM.S.INV calculates and returns the inverse of the standard normal cumulative distribution that has an arithmetic mean of 0 and standard deviation of 1 with a given probability.