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A Research Review and Evaluation, Government Printing Oce, 1983.) (a) A rm asks 12 job applicants about thefts from previous employers, using a polygraph to assess their truthfulness. Suppose that all 12 answer truthfully. Is the probability that the polygraph says at least 1 is deceptive? (b) What is the mean number among 12 truthful persons who will be classied as deceptive? What is the standard deviation of this number? (c) What is the probability that the number classied as deceptive is less than the mean?

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