POISSON |
POISSON(x, mean, cumulative) |
Returns the probability distribution function OR the cumulative probability function for a poisson distribution. |
x | The number of events. |
mean | The expected numeric value. |
cumulative | A logical value indicating the type of function to use: False (or 0) = [[probability distribution function]] (equal to) True (<> 0) = [[cumulative probability function]] (equal to or less than) |
REMARKS |
* This function is only available for backwards compatibility and should not be used. * POISSON.DIST was added in Excel 2010 to replace this function. * The poisson distribution is a [[discrete distribution]] * If "x" is not an integer, it is truncated. * If "x" is not numeric, then #VALUE! is returned. * If "mean" is not numeric, then #VALUE! is returned. * If "mean" = 0, then #NUM! is returned. * If "x" < 0, then #NUM! is returned. * If "x" = 0, then * If "cumulative" = False, then the height of the curve at "x" is returned. * If "cumulative" = True, then the area under the curve to the left of "x" is returned. * For the Microsoft documentation refer to support.microsoft.com |
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