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Statistics

Suppose that
30%

of all college students smoke cigarettes. A sample of
18
is selected randomly. What is the probability that exactly
10

students smoke? Round your answer to four decimal places.

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  1. http://onlinestatbook.com/2/probability/binomial.html
    C(18,10) = 18!/[10!(18-10)]
    P(18) = C(18,10) * .3^10 * .7*8

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  2. http://www.statisticshowto.com/binomial-distribution-formula/

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