Q2 (8 pts, adapted from textbook) A case control study in Berlin asked 239 lung cancer patients and 429 controls (matched to the cases by age and sex) whether they had kept a pet bird during adulthood See below for the contingency table Lung cancer No lung cancer Total Bird 98 101 199 No bird 141 328 469 Total 239 429 668 (2 pts) Compute the risk of lung cancer for bird owners and the risk of lung cancer for non bird owners in this study Please show your work (2 pts) In Part (a), we ask you to compute the risks of lung cancer for the two groups in this study Can these two risks be used as the risks of lung cancer for the populations of bird and non bird owners Explain (2 pts) How much more likely is lung cancer for bird owners than for non bird owners in this study that is, what is the increased risk Please show your work (2 pts) What information about risk would you want, in addition to the information on increased risk in Part (c) of this problem, before you make a decision about whether to own a pet bird Explain

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Question: Q2 (8 pts, adapted from textbook)_A case-control study in Berlin asked 239 lung cancer patients and 429 controls (matched to the cases by age and

Q2 (8 pts, adapted from textbook)_A case-control study in Berlin asked 239 lung cancer patients and 429 controls (matched to the cases by age and sex) whether they had kept a pet bird during adulthood. See below for the contingency table:

	Lung cancer	No lung cancer	Total
Bird	98	101	199
No bird	141	328	469
Total	239	429	668

(2 pts) Computethe risk of lung cancer for bird owners andthe risk of lung cancer for non-bird ownersin this study. Please show your work.

(2 pts) In Part (a), we ask you to compute the risks of lung cancer for the two groups in this study. Can these two risks be used as the risks of lung cancer for thepopulations of bird and non-bird owners? Explain.

(2 pts) How much more likely is lung cancer for bird owners than for non-bird owners in this study; that is, what is the increased risk? Please show your work.

(2 pts) What information about risk would you want, in addition to the information on increased risk in Part (c) of this problem, before you make a decision about whether to own a pet bird. Explain.

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