Machine-translated by Google. Questions are authored in English.
Top

Discussion

In a Poisson probability distribution

  • A.The mean and variance of the distribution are the same (equal)
  • B.The probability of success is always greater than 5
  • C.The number of trials is always less than 5
  • D.It always contains a contingency table

Answer: A

For a Poisson distribution with parameter \( \lambda \),

\[ \text{mean} = \lambda, \qquad \text{variance} = \lambda \]

so the two are always equal - a property unique to the Poisson among the standard discrete distributions, and the usual quick test of whether count data are Poisson.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.