Question

10.-/1 pointsseunderStat1253.023. Does crime pay? The FBI Standard Survey of Crimes showed that for about 80% of all property crimes (burglary, larceny, car theft, etc.), the criminals are never found and the case is never solved, Suppose a neighborhood district in a large city suffers repeated property crimes, not always perpetrated by the same criminals. The police are investigating six property crime cases in this district (a) What is the probability that none of the crimes will ever he solved? (Round your answer to three decimal places.) (b) What is the probability that at least one crime will be solved? (Round your answer to three decimal places.) (c) What is the expected number of crimes that will be solved? (Round your answer to two decimal places.) crimes What is the standard deviation? (Round your answer to two decimal places.) crimes (d) How many property crimes n must the police investigate before they can be at least 90 % sure of solving one or more cases? crimes 5.3 Hmwk - ADDTL Properties of the Binomial Distr Page 9 of 10 11.-/1 pointsbBUnderStat12 5.3.025 Innocent until proven guilty? In Japanese criminal trials, about 95% of the defendants are found guilty. In the United States, about 60% of the defendants are found guilty in criminal trialst. Suppose you are a news reporter following six criminal trials. (a) If the trials were in Japan, what is the probability that all the defendants would be found guilty? (Round your answer to three decimal places..) What is this probability if the trials were in the United States? (Round your answer to three decimal places.) (b) of the six trials, what is the expected number of guilty verdicts in Japan? (Round your answer to two decimal places.) verdicts What is the expected number in the United Sates? (Round your answer to two decimal places.) verdicts What is the standard deviation in Japan? (Round your answer to two decimal places.) verdicts What is the standard deviation in the United States? (Round your answer to two decimal places.) verdicts (c) As a U.S. news reporter, how many trials n would you need to cover to be at least 99% sure of two or more convictions trials How many trials n would you need if you covered trials in Japan? trials

Answer 1

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