8.The conditional probability of B given A can be found by _______.
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9.The data represent the results for a test for a certain disease. Assume one individual from thegroup is randomly selected. Find the probability of getting someone who tests negative, giventhat he or she did not have the disease.The individual actually had the diseaseYesNoPositive13418Negative10138a.The probability is approximately 0.885
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10.The table below displays results from experiments with polygraph instruments. Find thepositive predictive value for the test. That is, find the probability that the subject lied, giventhat the test yields a positive result.Did the subject actually lie?No (did not lie)Yes (did lie)Positive test results1840Negative test results3412a.The probability is0.69(Round to three decimal places as needed.)
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12.The probability that a randomly selected adult in a particular community is a smoker is 18%.The probability that a randomly selected adult in the community is a smoker, given that theadult earns more than $75,000 per year, is 18%. Are the events "is a smoker" and "earns morethan $75,000 per year" independent? Explain.
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