Question

In a Poisson distribution, the probability mass function is given by: \(\rho(x) = \frac{e^{-2}(2)^3}{3!},\) the mean value is:

• A. 4
• B. 3
• C. 2
• D. 1

Hint:

In a Poisson distribution, the mean and variance are both equal to λ.

Answer 1

The Correct Option is C

For a Poisson distribution, \( \lambda \) is the mean, where \( \lambda = 2 \) in this case.

Thus, the mean value is 2. Hence, the correct answer is (c).