POISSON function - The function returns the Poisson distribution in Excel

In predicting the number of events that occur within a specific time, one cannot help but use the POISSON function. The following article details how to use the POISSON function, the function returns the Poisson distribution.

In predicting the number of events that occur within a specific time, one cannot help but use the POISSON function. The following article details how to use the POISSON function, the function returns the Poisson distribution.

Description: The function returns the Poisson distribution, which is the basis for determining the number of events occurring over a defined period, for example, with the vehicle density on weekends, the number of vehicles passing through the toll booth in 1 minute. From the anticipation, there will be specific support measures.

Syntax: POISSON (x, mean, cumulative) .

Inside:

- x: Number of events, is a required parameter.

- mean: The value to be estimated (value in the form of numbers), is a required parameter.

- cumulative: A logical value that determines the format of the return value. The following values ​​are available:

+ cumulative = TRUE => function returns the cumulative Poisson probability that 0

+ cumulative = FALSE: function returns the cumulative Poisson probability that the number of events = x.

Attention:

- Poission function is calculated by the formula:

+ cumulative = TRUE:

POISSON function - The function returns the Poisson distribution in Excel Picture 1POISSON function - The function returns the Poisson distribution in Excel Picture 1

+ cumulative = FALSE:

POISSON function - The function returns the Poisson distribution in Excel Picture 2POISSON function - The function returns the Poisson distribution in Excel Picture 2

- If x is a decimal, the function takes an integer value of x.

- x and the value must be numeric otherwise the function returns the #VALUE error.

- If x

- If mean the function returns the value #NUM !.

For example:

- Calculate Poission when cumulative = True :

In the cell to calculate enter the formula: = POISSON (D13, D14, D15) .

POISSON function - The function returns the Poisson distribution in Excel Picture 3POISSON function - The function returns the Poisson distribution in Excel Picture 3

Pressing Enter results as:

POISSON function - The function returns the Poisson distribution in Excel Picture 4POISSON function - The function returns the Poisson distribution in Excel Picture 4

- Calculate Poission when cumulative = False :

In the cell to calculate enter the formula: = POISSON (D13, D14, D16) .

POISSON function - The function returns the Poisson distribution in Excel Picture 5POISSON function - The function returns the Poisson distribution in Excel Picture 5

Pressing Enter results as:

POISSON function - The function returns the Poisson distribution in Excel Picture 6POISSON function - The function returns the Poisson distribution in Excel Picture 6

Thus the Poission function value at the cumulative value is different. Hopefully the Poission function will help you in predicting events that occur in a specified time period.

Good luck!

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