The Analysis of Biological Data
2nd Edition
ISBN: 9781936221486
Author: Michael C. Whitlock, Dolph Schluter
Publisher: W. H. Freeman
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Chapter 1, Problem 21AP
To determine
To explain:To determine whether the,
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The authors of a paper randomly selected two samples of patients admitted to the hospital after suffering a stroke. One sample was selected from patients who received biofeedback weight training for 8 weeks, and the other sample was selected from patients who did not receive this training. At the end of 8 weeks, the time it took (in seconds) to stand from a sitting position and then to sit down again (called sit-stand-sit time) was measured for the people in each sample. Data consistent with summary quantities given in the paper are given below. For purposes of this exercise, you can assume that the samples are representative of the population of stroke patients who receive the biofeedback training and the population of stroke patients who do not receive this training.
Biofeedback Group
2.1
2.8
4.5
2.3
2.9
4.3
3.4
4.2
3.4
3.7
3.0
3.7
3.7
2.5
3.3
No Biofeedback Group
5.2
4.8
4.0
4.3
4.8
4.4
4.3
5.2
3.5
4.3
5.2
4.5
4.1
3.5
4.0
Conduct a test of hypothesis to test whether…
The authors of a paper randomly selected two samples of patients admitted to the hospital after suffering a stroke. One sample was selected from patients who received biofeedback weight training for 8 weeks, and the other sample was selected from patients who did not receive this training. At the end of 8 weeks, the time it took (in seconds) to stand from a sitting position and then to sit down again (called sit-stand-sit time) was measured for the people in each sample. Data consistent with summary quantities given in the paper are given below. For purposes of this exercise, you can assume that the samples are representative of the population of stroke patients who receive the biofeedback training and the population of stroke patients who do not receive this training.
Biofeedback Group
2.2
2.9
4.6
2.4
3.0
4.4
3.5
4.3
3.5
3.8
3.1
3.8
3.8
2.6
3.4
No Biofeedback Group
5.2
4.8
4.0
4.3
4.8
4.4
4.3
5.2
3.5
4.3
5.2
4.5
4.1
3.5
4.0
Conduct a test of hypothesis to test whether…
A study reported in the Journal of the America Medical Association investigated
the cardiac demands of heavy snow shoveling. Ten healthy men underwent
exercise testing with a treadmill and a cycle ergometer modified for arm
cranking. The men then cleared two tracts of heavy, wet snow by using a
lightweight plastic snow shovel and an electric snow thrower. Each subject's
heart rate, blood pressure, oxygen uptake, and perceived exertion during snow
removal were compared with the values obtained during treadmill and arm-
crank ergometer testing. Suppose the heart rates in beats per minute for each of
the 10 subjects were recorded at each physical activity (thus making it a
repeated measures design with treatments treadmill, ergometer, show shovel,
and snow thrower) and produced the following partial MANOVA result.
Effect
ACTIVITY
Multivariate tests for repeated measure: DV_1 (Spreadsheet39)
Sigma-restricted parameterization
Effective hypothesis decomposition
Test
Value
F
Wilks 0.07167…
Chapter 1 Solutions
The Analysis of Biological Data
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