SOLUTION: A quiz consists of 60 multiple choice​ questions, each with five possible​ answers, only one of which is correct. If a student guesses on each​ question, what is
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Question 1114478: A quiz consists of 60 multiple choice questions, each with five possible answers, only one of which is correct. If a student guesses on each question, what is the mean and standard deviation of the number of correct answers? Round to the nearest thousandth. Answer by rothauserc(4718) (Show Source):
You can put this solution on YOUR website! We use a binomial probability distribution
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probability of guessing a correct answer is 1/5(0.20) and there are 60 questions
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mean = 60 * (0.20) = 12
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standard deviation = square root(60*(0.20)*(1-0.20)) = 3.0984 approximately 3.098
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