To determine how well an observed set of frequencies fits an expected set of frequencies from a Poisson distribution, we must estimate:
A)no parameters.
B)one parameter (λ).
C)two parameters (μ, σ).
D)three parameters (μ, σ, n).

Question

Quizplus · Accepted Answer

The Poisson distribution has only one parameter, λ (the mean and variance of the distribution), which is used to estimate expected frequencies. Therefore, we only need to estimate one parameter to determine how well an observed set of frequencies fits an expected set of frequencies from a Poisson distribution.

To Determine How Well an Observed Set of Frequencies Fits