Question

Refer to the contingency table shown below.

  

Smoking by Race for Males Aged 18-24
  Smoker
(S)
Nonsmoker
(N)
Row Total
White (W)   289     571     860  
Black (B)   50     90     140  
Column Total   339     661     1,000  
 

  

 

 Click here for the Excel Data File
 
(a) Calculate the probabilities given below: (Round your answers to 4 decimal places.)
 

       
i. P(S)    
ii. P(W)    
iii. P(S | W)    
iv. P(S | B)    
v. P(S and W)    
vi. P(N and B)    
 

  

(b) Do you see evidence that smoking and race are not independent?
 

  • Yes
  • No


 
(c) Why might public health officials be interested in this type of data?
 

  • Health officials might target or design special programs based on race.
  • Health officials can use this as an excuse to explain the lack of initiatives to curb smoking.
  • Health officials are not interested.

 

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Hypothesis Testing

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Advanced Topics in Statistics

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