When a police officer responds to a call for help in a case of spousal abuse,what should the officer do? A randomized controlled experiment in Charlotte,North Carolina,studied three police responses to spousal abuse: advise and possibly separate the couple,issue a citation to the offender,and arrest the offender.The effectiveness of the three responses was determined by re-arrest rates.The table below shows these rates. Suppose we wish to test the null hypothesis that the proportions of subsequent arrests are the same regardless of the treatment assigned.Which of the following statements is true?
A)We cannot test this hypothesis because the police officers did not record the expected counts.
B)The test of the null hypothesis will have a very small P-value (below 0.0001)because the counts in each row are not identical.
C)We cannot test this hypothesis because the expected cell counts are less than five in too many of the cells.
D)The test of the null hypothesis will have a very small P-value (below 0.0001)because there were so few cases where there was more than one re-arrest.

Question

When a police officer responds to a call for help in a case of spousal abuse,what should the officer do? A randomized controlled experiment in Charlotte,North Carolina,studied three police responses to spousal abuse: advise and possibly separate the couple,issue a citation to the offender,and arrest the offender.The effectiveness of the three responses was determined by re-arrest rates.The table below shows these rates.  Suppose we wish to test the null hypothesis that the proportions of subsequent arrests are the same regardless of the treatment assigned.Which of the following statements is true?
A)We cannot test this hypothesis because the police officers did not record the expected counts. 
B)The test of the null hypothesis will have a very small P-value (below 0.0001)because the counts in each row are not identical. 
C)We cannot test this hypothesis because the expected cell counts are less than five in too many of the cells. 
D)The test of the null hypothesis will have a very small P-value (below 0.0001)because there were so few cases where there was more than one re-arrest.

Quizplus · Accepted Answer

The Answer of When a police officer responds to a call for help in a case of spousal abuse,what should the officer do? A randomized controlled experiment in Charlotte,North Carolina,studied three police responses to spousal abuse: advise and possibly separate the couple,issue a citation to the offender,and arrest the offender.The effectiveness of the three responses was determined by re-arrest rates.The table below shows these rates.  Suppose we wish to test the null hypothesis that the proportions of subsequent arrests are the same regardless of the treatment assigned.Which of the following statements is true?
A)We cannot test this hypothesis because the police officers did not record the expected counts. 
B)The test of the null hypothesis will have a very small P-value (below 0.0001)because the counts in each row are not identical. 
C)We cannot test this hypothesis because the expected cell counts are less than five in too many of the cells. 
D)The test of the null hypothesis will have a very small P-value (below 0.0001)because there were so few cases where there was more than one re-arrest.

When a Police Officer Responds to a Call for Help