Dear all,
I have a variable - number of people who are malnourished in a PSU. I have approximately 2000 independently surveyed PSUs. Data would like as follows:
X
20
30
50
70
.
.
.
.
80
Now, my doubt is how should I check whether this variable is following a Poisson distribution? I know I can compare mean and variance and expect them to be same. Is there any test which can be used to argue that this variable follows a Poisson distribution?

Thank you.