I want to get the prediction intervals of the poisson probability distribution.
When I use the function predIntPois with this set of numbers
I get the error:
Error in ebinom(0, sum.x, ci = TRUE, ci.type = "two-sided", conf.level = 1 - :
'size' must be a postive integer at least as large as 'x'.
However if I change for example the last number of the set of numbers with 1 more or 1 less, I don't get an error. And it works perfectly. How is this possible?
Results of Distribution Parameter Estimation
Assumed Distribution: Poisson
Estimated Parameter(s): lambda = 69.57143
Estimation Method: mle/mme/mvue
Data: c(70, 73, 80, 66, 62, 64, 72)
Sample Size: 7
Prediction Interval Method: conditional
Prediction Interval Type: two-sided
Confidence Level: 95%
Number of Future Observations: 1
Prediction Interval: LPL = 48
UPL = 88*
Hopefully someone can help me. Thanks!