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A study was made of 413 children who were hospitalized as a result of motor vehicle crashes. Among 290 children who were not using seat belts, 60 were injured severely. Among 123 children using seat belts, 16 were injured severely (based on data from "Morbidity Among Pediatric Motor Vehicle Crash Victims: The Effectiveness of Seat Belts," by Osberg and Di Scala, American Journal of Public Health, Vol. 82, No. 3). For this problem we want to know, is there sufficient sample evidence to conclude, at the 0.05 significance level, that the proportion of severe injuries is higher for children not wearing seat belts? Let pi be the proportion of severe injuries among all children not wearing seatbelts and who were involved in crashes. Let p2 be the proportion of severe injuries among all children wearing seatbelts and who were involved in crashes. Which is the proper expression of Ho? O Pi = P2 O Pi < P2 O pi > P2 Which is the proper expression of H1? O Pi < P2 O Pi = P2 O Pi > P2 Calculate p, to 4 decimal places: Calculate p, to 4 decimal places: Calculate the pooled sample estimate: p = Calculate the pooled sample estimate: q = For this test Zcritical (to 4 decimal places) For this test ztest = (to 4 decimal places) Determine the p-value, correct to 4 decimal places: Conclusion: O Do not reject Ho

A study was made of 413 children who were hospitalized as a result of motor vehicle crashes. Among 290 children who were not using seat belts, 60 were injured severely. Among 123 children using seat belts, 16 were injured severely (based on data from "Morbidity Among Pediatric Motor Vehicle Crash Victims: The Effectiveness of Seat Belts," by Osberg and Di Scala, American Journal of Public Health, Vol. 82, No. 3). For this problem we want to know, is there sufficient sample evidence to conclude, at the 0.05 significance level, that the proportion of severe injuries is higher for children not wearing seat belts? Let pi be the proportion of severe injuries among all children not wearing seatbelts and who were involved in crashes. Let p2 be the proportion of severe injuries among all children wearing seatbelts and who were involved in crashes. Which is the proper expression of Ho? O Pi = P2 O Pi < P2 O pi > P2 Which is the proper expression of H1? O Pi < P2 O Pi = P2 O Pi > P2 Calculate p, to 4 decimal places: Calculate p, to 4 decimal places: Calculate the pooled sample estimate: p = Calculate the pooled sample estimate: q = For this test Zcritical (to 4 decimal places) For this test ztest = (to 4 decimal places) Determine the p-value, correct to 4 decimal places: Conclusion: O Do not reject Ho

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A study was made of 413 children who were hospitalized as a result of motor vehicle crashes. Among 290 children who were not using seat belts, 60 were injured severely. Among 123 children using seat belts, 16 were injured severely (based on data from "Morbidity Among Pediatric Motor Vehicle Crash Victims: The Effectiveness of Seat Belts," by Osberg and Di Scala, American Journal of Public Health, Vol. 82, No. 3). For this problem we want to know, is there sufficient sample evidence to conclude, at the 0.05 significance level, that the proportion of severe injuries is higher for children not wearing seat belts? Let pi be the proportion of severe injuries among all children not wearing seatbelts and who were involved in crashes. Let p2 be the proportion of severe injuries among all children wearing seatbelts and who were involved in crashes. Which is the proper expression of Ho? Pi = P2 O Pi < P2 O pi > P2 Which is the proper expression of H1? O pi < P2 O Pi = P2 O P1 > P2 Calculate p1 to 4 decimal places: Calculate p, to 4 decimal places: Calculate the pooled sample estimate: p Calculate the pooled sample estimate: q For this test zcritical (to 4 decimal places) For this test ztest (to 4 decimal places) Determine the p-value, correct to 4 decimal places: Conclusion: O Do not reject Ho O O
Transcribed Image Text:A study was made of 413 children who were hospitalized as a result of motor vehicle crashes. Among 290 children who were not using seat belts, 60 were injured severely. Among 123 children using seat belts, 16 were injured severely (based on data from "Morbidity Among Pediatric Motor Vehicle Crash Victims: The Effectiveness of Seat Belts," by Osberg and Di Scala, American Journal of Public Health, Vol. 82, No. 3). For this problem we want to know, is there sufficient sample evidence to conclude, at the 0.05 significance level, that the proportion of severe injuries is higher for children not wearing seat belts? Let pi be the proportion of severe injuries among all children not wearing seatbelts and who were involved in crashes. Let p2 be the proportion of severe injuries among all children wearing seatbelts and who were involved in crashes. Which is the proper expression of Ho? Pi = P2 O Pi < P2 O pi > P2 Which is the proper expression of H1? O pi < P2 O Pi = P2 O P1 > P2 Calculate p1 to 4 decimal places: Calculate p, to 4 decimal places: Calculate the pooled sample estimate: p Calculate the pooled sample estimate: q For this test zcritical (to 4 decimal places) For this test ztest (to 4 decimal places) Determine the p-value, correct to 4 decimal places: Conclusion: O Do not reject Ho O O
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