For a Poisson distribution with parameter λ = 4, what is the variance of the distribution?
Correct answer: B. 4
- A. 2
- B. 4
- C. 8
- D. 16
Explanation
For a Poisson distribution, both the mean and the variance equal λ. Hence, when λ = 4, the variance is also 4.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Probability and Probability Distributions
30 free Probability and Probability Distributions MCQs from Quantitative Methods, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Quantitative Methods questions like this
Quantitative Methods is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Probability and Probability Distributions questions
If X follows a binomial distribution with n = 20 and probability of success p = 0.3, what is its expected value?
A fair coin is tossed four times. What is the probability of getting exactly two heads?
Factory A produces 60% of a firm's items and has a defect rate of 2%. Factory B produces 40% and has a defect rate of 5%. Given that an item is defective, what is the probability it came from Factory B?
A discrete random variable X takes the values 1, 2, and 4 with probabilities 0.2, 0.5, and 0.3, respectively. What is E(X)?
A trial has a 0.2 probability of success on each independent attempt. What is the probability that the first success occurs on the third attempt?
If X has a standard normal distribution, what is P(X > 0)?