<PRE><B>Question 693966</B>
A test consists of 70 multiple choice questions, each with five possible answers, only one of which is correct. find the mean and the standard deviation of the number of correct answers.
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Binomial distribution with n = 70 and p(correct) = 1/5
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mean = np = 70(1/5) = 14
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std = sqrt(npq) = sqrt(14(4/5))= 3.3466
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Cheers,
Stan H.
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