SOLUTION: a test consists of 80 multiple choice questions each with five possible answers. Find mean and standard deviation of the number of correct answers
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Question 867511: a test consists of 80 multiple choice questions each with five possible answers. Find mean and 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 80 multiple choice questions each with five possible answers.
n = 80 ; p(correct) = 1/5
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Find mean and standard deviation of the number of correct answers
mean = n*p = (1/5)80 = 16
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std = sqrt[npq] = sqrt[16*(4/5)] = 8/sqrt(5)
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Cheers,
Stan H.
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