SOLUTION: A test consists of 10 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 1159859: A test consists of 10 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 Boreal(15235) (Show Source):
You can put this solution on YOUR website! mean is np=10*0.2=2 answers
variance is np(1-p)=2*0.8=1.6 answers^2
sd is sqrt(V)=1.26 answers
