Introductory Biostatistics

2.30 Measure Value

Pearson’s 
0.786

Kendall’s 
0.619

Spearman 
0.767

2.31 Measure Standard Test

Pearson’s 0.940 0.956

Kendall’s 0.896 0.955

Spearman 0.960 0.988

2.32 20 patients with nodes, 33 patients without nodes.

Factor xs^2 s

Age

Without node 60.1 31.4 5.6

With node 58.3 49.1 7.0

Acid

Without node 64.5 744.2 27.3

With node 77.5 515.3 22.7

2.33 All patients: 0.054; with nodes: 0.273; without nodes:
0.016. Nodal
involvement seems to change the strength of the relationship.

2.34 (a)12 females, 32 males; 20 with residency, 24 without.

Factor xs

Gender

Females 0.00116 0.00083

Males 0.00139 0.00091

Residency

Without 0.00147 0.00099

With 0.00116 0.00073

(b)Between complaints and revenue: 0.031; between complaints and

work load: 0.279.

2.35 (a)Between y andx 1 is 0.756;(b)between y andx 2 is 0.831.

Chapter 3

3.1 Odds ratio¼ 0 :62; PrðPap¼yesÞ¼ 0 :82, PrðPap¼yesjblackÞ¼

0 : 7500 :82.

3.2 Odds ratio¼ 5 :99; Prðsecond¼presentÞ¼ 0 :65, Prðsecond¼

presentjfirst¼presentÞ¼ 0 : 7800 :65.

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