Q #1

- V 5.3 HmwkeADDTLPropertiesof x i 6 9 O Q Q https://www.webassign.net/web/Student/AssignmentResp... A\" {3 e. 6'\" ;: {31:12. for whom you have no addresses and decide to use the company to track them. Q USE SALT (a) Make a histogram showing the probability of r = 0 to 7 friends for whom an address will be found. as 0.4 025 \"3 0.2 Mr) 2 0.1 0 o I 2 a 4 5 s 7 O l' ,0 Type here to search A company is in the business of nding addresses of long-lost friends. The company claims to have a 70% success rate. Suppose that you have the names of seven friends - V 5.3 HmwkeADDTLPropertiesof x s a 6 9 O Q Q https://www.webassign.net/web/Student/AssignmentResp... A\" {3 Ci 6'\" 5:: g . {3 l {'5 . '13 0.25 0.2 pm ' Pl\" O (b) Find the mean and standard deviation of this probability distribution. What is the expected number of friends for whom addresses will be found? (Round your standard deviation to two decimal places.) a = x friends (c) What is the smallest number of names would you have to submit to be at least 96% sure that at least two addresses will be found? (Enter your answer as a whole number.) CW names Need new i i ,0 Type here to search e - V 5.3 HmwkeADDTLPropertiesof x i. 6 9 O Q Q https://www.webassign.net/web/Student/AssignmentResp... A\" {3 Fl 6'\" 5:: g . {3 l {'5 . USA Today reports that about 25% of all prison parolees become repeat offenders. Alice is a social worker whose job is to counsel people on parole. Let us say success means a person does not become a repeat offender. Alice has been given a group of four parolees. I use SALT (a) Find the probability P(r) of r successes ranging from 0 to 4. (Round your answers to three decimal places.) Pa = E m = E m = :1 mm = E m = E (b) Make a histogram for the probability distribution of part (a). 0.6 05 0,4 F ( r) P l :1 03 0.2 0.1 ,0 Type here to search e - V 5.3 HmwkeADDTLPropertiesof x e e. 6 9 O Q Q https://www.webassign.net/web/Student/AssignmentResp... A\" {3 Ci 6'\" 5:: g . {3 l {'5 . Flt) O O (c) What is the expected number of parolees in Alice's group who will not be repeat offenders? What is the standard deviation? (Round your answer to two decimal places.) (d) What is the smallest group Alice can counsel to be at least 98% sure that three or more parolees will not become repeat offenders? E parole-es Need Help? i ,0 Type here to search e VA 5.3 Hmwk - ADDTL Properties of X *Course Hero X *Homework Help - Q&A from On x + X -> @ https://www.webassign.net/web/Student/Assignment-Resp... A" to sd . . . Need Help? Read It 8. [-/1 Points] DETAILS BBUNDERSTAT12 5.3.020.S. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The probability that a single radar station will detect an enemy plane is 0.65. In USE SALT (a) What is the smallest number of stations required to be at least 98% certain that an enemy plane flying over will be detected by at least one station? stations (b) If seven stations are in use, what is the expected number of stations that will detect an enemy plane? stations Need Help? Read It 9. [-/1 Points] DETAILS BBUNDERSTAT12 5.3.022.S. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The Denver Post reported that a recent Audit of Los Angeles 911 calls showed that 85% were not emergencies. Suppose the 911 operators in Los Angeles have just received Type here to search O S 9:28 AM 42OF 2/11/2022- VA 53 Hkai ADDTL Preperties Ol X 6 9 O Q Q https://www.webassign.net/web/Student/AssignmentResp... A\" {3 Oi Eh 5:: g . {3 l {'5 . 9. [-I1 Points] DETAILS BBUNDERSTAT12 5.3.0225. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The Denver Post reported that a recent Audit of Los Angeles 911 calls showed that 85% were not emergencies. Suppose the 911 operators in Los Angeles have just received three calls. IE use SALT (a) What is the probability that all three calls are, in fact, emergencies? (Round your answer to three decimal places.) :1 (b) What is the probability that two or more calls are not emergencies? (Round your answer to three decimal places.) :1 (c) What is the smallest number of calls n that the 911 operators need to answer to be at least 96% (or more) sure that at least one call is, in fact, an emergency? (Enter your answer as a whole number.) S calls Need Help? i I 10. [-I1 Points] DETAILS BBUNDERSTAT12 5.3.0235. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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 ,0 Type here to search - VA 53 Hkai ADDTL Preperties Of X 6 9 O Q Q https://www.webassign.net/web/Student/AssignmentResp... A\" {3 Oi Eh 5:: g . {3 l {'5 . 10. [-I1 Points] DETAILS BBUNDERSTAT12 5.3.0235. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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'r. Suppose a neighborhood district in a large city suffers repeated property crimes, not always perpetrated by the same criminals. The police are investigating eleven property crime cases in this district. l2 USE SALT (a) What is the probability that none of the crimes will ever be solved? (Round your answer to three decimal places.) :l (b) What is the probability that at least one crime will be solved? (Round your answer to three decimal places.) :l (c) What is the expected number of crimes that will be solved? What is the standard deviation? (Round your answer to two decimal places.) (d) What is the smallest number of property crimes n that the police must investigate before they can be at least 90% sure of solving one or more cases? I Need Help? ii v ,0 Type here to search e - VA 53 Hkai ADDTL Preperties Of X 6 9 O Q Q https://www.webassign.net/web/Student/AssignmentResp... A\" {3 Oi Eh 5:: g . {3 l {'5 . 10. [-I1 Points] DETAILS BBUNDERSTAT12 5.3.0235. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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'r. Suppose a neighborhood district in a large city suffers repeated property crimes, not always perpetrated by the same criminals. The police are investigating eleven property crime cases in this district. l2 USE SALT (a) What is the probability that none of the crimes will ever be solved? (Round your answer to three decimal places.) :l (b) What is the probability that at least one crime will be solved? (Round your answer to three decimal places.) :l (c) What is the expected number of crimes that will be solved? What is the standard deviation? (Round your answer to two decimal places.) (d) What is the smallest number of property crimes n that the police must investigate before they can be at least 90% sure of solving one or more cases? I Need Help? ii v ,0 Type here to search e - m 53 Hkai ADDTL Preperties Of X 6 9 O Q Q https://www.webassign.net/web/Student/AssignmentResp... A\" {3 Fl 6'\" \"I g . {3 l {'5 . | | A 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 tn'als'r. Suppose you are a news reporter following ten criminal trials. USE SAL (a) If the trials were in Japan, what is the probability that all the defendant: 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 ten trials, what is the expected number of guilty verdicts in Japan? verdicts What is the expected number in the United Sates? 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, what is the smallest number of trials n you would need to cover to be at least 99% sure of two or more convictions? I trials What is the smallest number of trials n you would need if you covered trials in Japan? trials ,0 Type here to search e