I need answer to question 56 only.
You are a nurse practitioner working in an ambulatory clinic in Illinois with a case load of 350 patients.
You notice that a large proportion (179 patients) have COPD, and you wonder if it is related to smoking.
You create the following 2 x 2 table to explore the relationship between smoking and COPD
:
With COPD 
Without COPD 
total 

Smokers 
82 
97 
179 
NonSmokers 
18 
153 
171 
100 
250 
350 
1. What is the rate of COPD among your patients who smoke?
2. What is the relative risk of COPD among the smokers and nonsmokers?
3. What is the risk for COPD that can be attributed to smoking?
4. What are the odds of getting COPD if a patient is a smoker?
5. You learn that the rate of COPD among nonsmokers in the state of Illinois is 0.26. Why does that statistic cause you concern? What is your next step?
6. What other statistics would help you determine how big the problem is among your patients?
I need answer to question 56 only.
Answers:
5. This is a very dangerous disease and very bad for human our aim is how to minimizes this rate.
6. We use the chisquare test to determine how big the problem is among the patients,
Conclusion:
The chisquare statistic is( calculated value) 53.349 and the tabulated value at 5% level of significance is 3.841.
therefore the calculated value is greater than the tabulated value (53.349 > 3.841)
we reject the null hypothesis.
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