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) and produced the following partial ANOVA result. Treadmill Arm-Crank Ergonometer SUMMARY Snow Shovel Snow Thrower ANOVA Source of Variation Subjects Physical Activity Pure Error Total Count 10 10 10 10 SS 2795.6 30549.6 Sum Average Variance 178 281.1111 171 356.6667 175 219.1111 123.6 336.9333 1780 1710 1750 1236 df MS F P-value F crit 9 310.6222 1.055103 0.425061 2.250131 39 What is the computed value of the F-test statistic for the physical activity effect? Final answer
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) and produced the following partial ANOVA result. Treadmill Arm-Crank Ergonometer SUMMARY Snow Shovel Snow Thrower ANOVA Source of Variation Subjects Physical Activity Pure Error Total Count 10 10 10 10 SS 2795.6 30549.6 Sum Average Variance 178 281.1111 171 356.6667 175 219.1111 123.6 336.9333 1780 1710 1750 1236 df MS F P-value F crit 9 310.6222 1.055103 0.425061 2.250131 39 What is the computed value of the F-test statistic for the physical activity effect? Final answer
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Transcribed Image Text: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) and produced the
following partial ANOVA result.
Treadmill
Arm-Crank Ergonometer
SUMMARY
Snow Shovel
Snow Thrower
ANOVA
Source of Variation
Subjects
Physical Activity
Pure Error
Total
Count
10
10
10
10
SS
2795.6
30549.6
Sum Average Variance
178 281.1111
171 356.6667
175 219.1111
123.6 336.9333
1780
1710
1750
1236
df
MS
F
P-value F crit
9 310.6222 1.055103 0.425061 2.250131
39
What is the computed value of the F-test statistic for the physical activity effect? Final answer
Transcribed Image Text:Treadmill
Arm-Crank Ergonometer
Snow Shovel
Snow Thrower
ANOVA
SUMMARY
Source of Variation
Subjects
Physical Activity
Pure Error
Total
Count
< Previous
10
10
10
10
SS
2795.6
30549.6
Sum Average Variance
1780
178 281.1111
1710
171 356.6667
1750
1236
df
175 219.1111
123.6 336.9333
MS
F
P-value
F crit
9 310.6222 1.055103 0.425061 2.250131
39
What is the computed value of the F-test statistic for the physical activity effect? Final answer
to 2 decimal places.
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