Teaching CSIR NET Mock Test Series Mathematical Science Statistics & Exploratory Data Analysis Random Variables & Distribution Functions
Let Z and W be independent Poisson random variables with parameters 4 and 5, respectively. Which of the following statements are correct?
1
The sum of random variables Z and W is a Poisson random variable with parameter 9.
2
The difference between random variables Z and W is a Poisson random variable with parameter -1.
3
The sum of random variables Z and W is a Poisson random variable with parameter -1.
4
The difference between random variables Z and W is a Poisson random variable with parameter 9.