1. A mayor is concerned about the percentage of cityresidents who express diappr
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1. A mayor is concerned about the percentage of cityresidents who express diapproval of his job performance. Hispolotical committee pays for a newspaper ad, hoping it will keepthe disapproval rate below 17%.They willl use a follow-uppoll to assess the ad's effectiveness.A.Ho:p=0.17 Ha:p>0.17 B. Ho:p<0.17 Ha:p = 0.17 C. Ho:p = 0.17 Ha:p <0.17 D. Ho:p>0.17 Ha:p<0.17 E. Ho:p>0.17 Ha:p =0.17 2. Asurvey investigates whether the proportion of 8% foremployees who commute over 30 minutes by car to work is higher thanit was five years ago. A test on employee commuting over 30 minutesby car was done on a random sample of 1000 employees, and foubdcommuting over 30 minutes by car to be 12%.Test an appropriatehypothesis and state your conclusion. Be sure the appropriateassumption and conditions are satisfied before you proceed. A.Ho:p = 0.08; Ha:p#0.08; z=4.66; P-value<0.99999.This doesnot show a proportion in commuting over 30 minutes by car greaterthan8%. B. Ho:p =0.08; Ha:p>0.08; z=4.66; P=value <0.00001. Thisdoe not show a proportion in commuting over 30 minutes by cargreater than 8%. C. Ho:p=0.08; Ha:p<0.08;z=-4.66; p-value >0.99999. D. Ho:p=0.08; Ha:p>0.08; z=-4.66;P-value >0.00001. E. Ho:p = 0.08; Ha:p<0.08; z=4.66; P=value<0.99999 2. The U.S. Department of Labor and Statistics released thecurrent unemployment rate of 5.3% for the month in the U.S.andclaims the unemployment has not changed in the last two months. Anindependent organization, however, has reason to believe that theunemployment rate has decreased. A survey of unemployment was doneon a random sample size of 1000 and found unemployment at 3.8%.Test an appropriate hypthesis and state your conclusion. Be surethe appropriate assumptions and conditions are satisfied before youproced A.Ho:p = 0.053; Ha:p>0.053; z=2.12;P=value=0.983 This datashows that the unemployment rate has decreased B.Ho:p = 0.053; Ha:p#0.053; z=-2.12;P=value = 0.34. This data shows that the unemployment rate hasdecreased. C.Ho:p=0.053; Ha:p <0.053; z=2.12;P -value=0.017; This datadoes not show that the rate decreased. D.Ho:p=0.053; Ha:p>0.053; z=-2.12; P=value + 0.983. Thisdata does not show that the rate decreased. E. Ho:p = 0.053; Ha:p<0.053; z=-2.12; P-value =0.017>This data shows that the rate has decreased. 1. A mayor is concerned about the percentage of cityresidents who express diapproval of his job performance. Hispolotical committee pays for a newspaper ad, hoping it will keepthe disapproval rate below 17%.They willl use a follow-uppoll to assess the ad's effectiveness.
A.Ho:p=0.17 Ha:p>0.17 B. Ho:p<0.17 Ha:p = 0.17 C. Ho:p = 0.17 Ha:p <0.17 D. Ho:p>0.17 Ha:p<0.17 E. Ho:p>0.17 Ha:p =0.17 2. Asurvey investigates whether the proportion of 8% foremployees who commute over 30 minutes by car to work is higher thanit was five years ago. A test on employee commuting over 30 minutesby car was done on a random sample of 1000 employees, and foubdcommuting over 30 minutes by car to be 12%.Test an appropriatehypothesis and state your conclusion. Be sure the appropriateassumption and conditions are satisfied before you proceed. A.Ho:p = 0.08; Ha:p#0.08; z=4.66; P-value<0.99999.This doesnot show a proportion in commuting over 30 minutes by car greaterthan8%. B. Ho:p =0.08; Ha:p>0.08; z=4.66; P=value <0.00001. Thisdoe not show a proportion in commuting over 30 minutes by cargreater than 8%. C. Ho:p=0.08; Ha:p<0.08;z=-4.66; p-value >0.99999. D. Ho:p=0.08; Ha:p>0.08; z=-4.66;P-value >0.00001. E. Ho:p = 0.08; Ha:p<0.08; z=4.66; P=value<0.99999 2. The U.S. Department of Labor and Statistics released thecurrent unemployment rate of 5.3% for the month in the U.S.andclaims the unemployment has not changed in the last two months. Anindependent organization, however, has reason to believe that theunemployment rate has decreased. A survey of unemployment was doneon a random sample size of 1000 and found unemployment at 3.8%.Test an appropriate hypthesis and state your conclusion. Be surethe appropriate assumptions and conditions are satisfied before youproced A.Ho:p = 0.053; Ha:p>0.053; z=2.12;P=value=0.983 This datashows that the unemployment rate has decreased B.Ho:p = 0.053; Ha:p#0.053; z=-2.12;P=value = 0.34. This data shows that the unemployment rate hasdecreased. C.Ho:p=0.053; Ha:p <0.053; z=2.12;P -value=0.017; This datadoes not show that the rate decreased. D.Ho:p=0.053; Ha:p>0.053; z=-2.12; P=value + 0.983. Thisdata does not show that the rate decreased. E. Ho:p = 0.053; Ha:p<0.053; z=-2.12; P-value =0.017>This data shows that the rate has decreased.
Explanation / Answer
1) c) is the correct one , becuase Ha:p<0.17 B) is the right choice to test, andnp0=1000(0.08)=80>10 and nq0>10 So, 2) B. Ho:p =0.08; Ha:p>0.08; z=4.66; P=value<0.00001. But the conclusion should be a proportion incommuting over 30 minutes by car greater than 8%. 3) c)Ho:p=0.053; Ha:p <0.053; z=-2.12;P-value=0.017<=0.05; So,the conclusion should be suchthat the data does show that the rate decreased. 2) B. Ho:p =0.08; Ha:p>0.08; z=4.66; P=value<0.00001. But the conclusion should be a proportion incommuting over 30 minutes by car greater than 8%. 3) c)Ho:p=0.053; Ha:p <0.053; z=-2.12;P-value=0.017<=0.05; So,the conclusion should be suchthat the data does show that the rate decreased.Related Questions
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