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EXPONDIST

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This function returns the exponential distribution or the probability density.

EXPONDIST(*value*,*lambda*,*cumulative*)

This function has these arguments:

Argument | Description |
---|---|

value |
Value of the function; must be positive or zero |

lambda |
Parameter value; must be greater than zero |

cumulative |
Logical value indicating whether to return the cumulative distribution; set to TRUE to return the cumulative distribution; set to FALSE to return the probability density |

Use this function to model the time between events, such as how long an automated bank teller takes to deliver cash. For example, you can use this function to determine the probability that the process takes at most one minute.

The cumulative distribution is calculated as follows:

where x is the *value* argument, lambda is the *lambda* argument.

The probability density is calculated as follows:

where x is the *value* argument, lambda is the *lambda* argument.

Accepts numeric data, except the third argument, which accepts logical data. Returns numeric data.

EXPONDIST(C12,10,TRUE)

EXPONDIST(R12C3,8,FALSE)

EXPONDIST(0.2,10,TRUE) gives the result 0.8646647168

See Also