The president of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies. He selects a sample of 15 families, some with only a single insured driver, others with several teenage drivers, and pays each family a stipend to contact the two companies and ask for a price quote. To make the data comparable, certain features, such as the deductible amount and limits of liability, are standardized. The data for the sample of families and their two insurance quotes are reported below.    At the 0.10 significance level, can we conclude that there is a difference in the amounts quoted? Hint: For the calculations, assume the "Midstates Car Insurance" as the first sample.     Midstates Car   Gecko Mutual Family Insurance   Insurance Becker $ 2,090     $ 1,610   Berry   1,683       1,247   Cobb   1,402       2,327   Debuck   1,830       1,367   DuBrul   930       1,461   Eckroate   697       1,789   German   1,741       1,621   Glasson   1,129       1,914   King   1,018       1,956   Kucic   1,881       1,772   Meredith   1,571       1,375   Obeid   874       1,527   Price   1,579       1,767   Phillips   1,577       1,636   Tresize   860       1,188         State the decision rule for 0.10 significance level: H0: μd = 0  H1: μd ≠ 0. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.)     Compute the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)

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The president of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies. He selects a sample of 15 families, some with only a single insured driver, others with several teenage drivers, and pays each family a stipend to contact the two companies and ask for a price quote. To make the data comparable, certain features, such as the deductible amount and limits of liability, are standardized. The data for the sample of families and their two insurance quotes are reported below. 

 

At the 0.10 significance level, can we conclude that there is a difference in the amounts quoted? Hint: For the calculations, assume the "Midstates Car Insurance" as the first sample.

 

  Midstates Car   Gecko Mutual
Family Insurance   Insurance
Becker $ 2,090     $ 1,610  
Berry   1,683       1,247  
Cobb   1,402       2,327  
Debuck   1,830       1,367  
DuBrul   930       1,461  
Eckroate   697       1,789  
German   1,741       1,621  
Glasson   1,129       1,914  
King   1,018       1,956  
Kucic   1,881       1,772  
Meredith   1,571       1,375  
Obeid   874       1,527  
Price   1,579       1,767  
Phillips   1,577       1,636  
Tresize   860       1,188  
 

 

 

  1. State the decision rule for 0.10 significance level: H0: μd = 0  H1: μd ≠ 0. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.)

 

 
  1. Compute the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)

 

 
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