Question

What are the mean and standard deviation of a binomial probability distribution with `n=21` and `p=4/17`?

Answer 1

Mean `=84/17=4.94118`
Standard deviation `=1.94385`

Explanation:

For Binomial Probability Distribution

The Mean `=np=21(4/17)=84/17`
Standard Deviation `=sqrt(npq)=sqrt(np(1-p))=sqrt(21(4/17)(1-4/17))=1.94385`

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