Question Bank • QB_SUB_EM_0156 NAT • 2 Marks

Section 1: Engineering Mathematics

Probability and Statistics

Subtopic: Mean, median, mode and standard deviation

Question Statement:

For a Poisson random variable $X$ with parameter $\lambda = 2.0$, the variance $\text{Var}(X)$ is equal to:

Answer Key:

2.0

Step-by-Step Solution & Explanation

For a Poisson distribution, the mean and the variance are both identically equal to the parameter $\lambda$. Hence $\text{Var}(X) = 2.0$.
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