CA Foundation P3 · Chapter 16 · Question 5 of 9
The standard deviation of a Poisson distribution is 3. Its mean is:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: B) 9
Explanation
In a Poisson distribution, mean = variance = m. Variance = SD² = 9, so the mean is 9. Equating the mean to the SD (3) is the typical error.
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