SOLUTION: 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 an
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Question 693966: 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. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! 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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