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Binomial & Poisson Distributions · Question 28 of 68

Question 28

EasyOriginal question

XX follows a binomial distribution with n=50n = 50 and p=0.4p = 0.4. What is its mean?

Options for question 28

Show the answer and explanation
CorrectNot quiteAnswer B

Correct answer: B

Explanation

  1. Mean =np= np.

  2. 50×0.4=2050 \times 0.4 = 20.

Worth noting

12 is the variance, npqnpq.

Concept
The mean of a binomial distribution
Typical time
60 s
Your time
—
The rule this testsMean and variance of a binomial distribution
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Ten questions from Binomial & Poisson Distributions, at your own pace.

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