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17-03-2017
Mathematics

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A binomial probability has p=.20 and n=100, what are the mean and standard deviation?

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LammettHash LammettHash

17-03-2017

Mean: [tex]np=100\times0.20=20[/tex]

Standard deviation: [tex]\sqrt{np(1-p)}=\sqrt{100\times0.20\times0.80}=4[/tex]

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