## Excel EXPON.DIST Function ### Description

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

### Syntax and arguments

Formula syntax

EXPON.DIST(array1,array2,cumulative)

Arguments

 X: Required, the value of the function. It must be ≥ 0. Lambda: Required, the parameter of the distribution. It must be ≥ 0. Cumulative: Required, a logical argument that specifies the type of the exponential function to be returned.TRUE: returns the cumulative distribution function;FALSE: returns the probability density function.

### 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 2010 and later versions.

### 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:

=EXPON.DIST(2,5,TRUE)  //Return cumulative distribution function

=EXPON.DIST(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 NORM.S.DIST Function
The NORM.S.DIST calculates and returns the standard normal cumulative distribution function or probability density function of a value for an arithmetic mean of 0 and standard deviation of 1

• 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.

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