x,mean,cumulative!This function is available for compatibility with (!idspnExcel_2007) and earlier.Returns the Poisson distribution!is ...

!x,mean,cumulative!!This function is available for compatibility with (!idspnExcel_2007) and earlier.Returns the Poisson distribution!is the number of events!is the expected numeric value, a positive number!is a logical value: for the cumulative Poisson probability, use TRUE; for the Poisson probability mass function, use FALSE!