Problem solving please

label Algebra
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A five question multiple choice quiz has five choices for each answer. Use the random number table provided, with 0’s representing incorrect answers, and 1’s representing correct answers to answer the following question: What is the experimental probability of correctly guessing at random exactly two correct answers? 

May 18th, 2015

(= 25 x 0.2) correct answers if all questions are answered by guessing. This is the mean (or expected value) of the binomial random variable when n = 25 and p = 0.2. The standard deviation is 1.732 = sqrt(3) = sqrt(25 x 0.2 x 0.75). Approximately two-thirds of the students who guess on the exam will fall within one standard deviation of the mean, i.e., will get 3, 4, or 5 questions correct.

May 18th, 2015

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May 18th, 2015
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May 18th, 2015
Sep 24th, 2017
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