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Biostatistics

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ANSWERS TO ODD-NUMBERED EXERCISES A-149<br />

Pain<br />

X 2 ¼ 0:444<br />

d:f: ¼ 2; p ¼ 0:801<br />

2 cells with expected counts less than 5.0<br />

Nausea and Vomiting<br />

X 2 ¼ 0:483<br />

d:f: ¼ 2; p ¼ 0:785<br />

37. cOR ¼ 2:06; 95% C.I.: .92, 4.61<br />

41. X 2 ¼ 13:530<br />

d:f: ¼ 1; p ¼ 0:000<br />

43. Test statistic ¼ 2; p ¼ :019 (one-sided test)<br />

45. X 2 ¼ 8:749<br />

d:f: ¼ 1; p ¼ 0:003<br />

47. X 2 ¼ 4:875<br />

d:f: ¼ 1; p ¼ 0:027<br />

49. cOR ¼ 3:79; 95% C.I.: 1.52, 9.48OR<br />

51. X 2 ¼ 11:589<br />

d:f: ¼ 1; p ¼ 0:001<br />

Chapter 13<br />

13.3.1. P ¼ :3036, p ¼ :6072<br />

13.3.3. P ðx 2j13;:5Þ ¼:0112. Since :0112

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