EBK FUNDAMENTALS OF BIOSTATISTICS
8th Edition
ISBN: 9780101123402
Author: Rosner
Publisher: YUZU
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Textbook Question
Chapter 8, Problem 40P
The degree of clinical agreement among physicians on the presence or absence of generalized lymphadenopathy was assessed in 32 randomly selected participants from a prospective study of male sexual contacts of men with acquired immunodeficiency syndrome (AIDS) or an AIDS-related condition (ARC) [8]. The total number of palpable lymph nodes was assessed by each of three physicians. Results from two of the three physicians are presented in Table 8.15.
Should a one-sided or a two-sided test be performed? Why?
Table 8.15 Reproducibility of assessment of number of palpable lymph nodes among sexual contacts of AIDS or ARC patients
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The authors of the paper "Statistical Methods for Assessing Agreement Between Two Methods of Clinical Measurement" compared two different instruments for measuring a subject's ability to breathe out air.† (This measurement is helpful in diagnosing various lung disorders.) The two instruments considered were a Wright peak flow meter and a mini-Wright peak flow meter. Seventeen subjects participated in the study, and for each subject air flow was measured once using the Wright meter and once using the mini-Wright meter. Subject Mini-WrightMeter WrightMeter Subject Mini-WrightMeter WrightMeter 1 512 494 10 445 433 2 430 395 11 432 417 3 520 516 12 626 656 4 428 434 13 260 267 5 500 476 14 477 478 6 600 557 15 259 178 7 364 413 16 350 423 8 380 442 17 451 427 9 658 650
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The authors of the paper "Statistical Methods for Assessing Agreement Between Two Methods of Clinical Measurement" compared two different
instruments for measuring a subject's ability to breathe out air.† (This measurement is helpful in diagnosing various lung disorders.) The two
instruments considered were a Wright peak flow meter and a mini-Wright peak flow meter. Seventeen subjects participated in the study, and for
each subject air flow was measured once using the Wright meter and once using the mini-Wright meter.
Subject
1
2
3
4
5
6
7
8
9
Mini-
Wright
Meter
512
430
520
428
500
600
364
380
658
Wright
Meter
+
494
395
516
434
476
557
413
442
650
Subject
10
11
12
13
14
15
16
17
Mini-
Wright
Meter
445
432
626
260
477
259
350
451
Wright
Meter
433
417
656
267
478
178
423
427
(a) Suppose that the Wright meter is considered to provide a better measure of air flow, but the mini-Wright meter is easier to transport and to
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Chapter 8 Solutions
EBK FUNDAMENTALS OF BIOSTATISTICS
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