At the 0.05 level of significance, test for any significantdifferences in the treatments (physical activity) in terms of theireffect on heart rates. Show complete solutions (8 step procedure).Also required to submit the STATISTICA and R solutions for thispart.
A study reported in the Journal of the American MedicalAssociation investigated the cardiac demands of heavy snowshoveling. Ten healthy men underwent exercise testing with atreadmill and a cycle ergometer modified for arm cranking. The menthen cleared two tracts of heavy, wet snow by using a lightweightplastic snow shovel and an electric snow thrower. Each subject’scomposite score consisting of heart rate blood pressure, oxygenuptake, and perceived exertion during snow removal were comparedwith the values obtained during treadmill and arm-crank ergometertesting. The data below gives the heart rates in beats per minutefor each of the 10 subjects.
Subject | Treadmill | Arm-Crank Ergometer | Snow Shovel | Snow Thrower |
1 | 177 | 205 | 180 | 98 |
2 | 151 | 177 | 164 | 120 |
3 | 184 | 166 | 167 | 111 |
4 | 161 | 152 | 173 | 122 |
5 | 192 | 142 | 179 | 151 |
6 | 193 | 172 | 205 | 158 |
7 | 164 | 191 | 156 | 117 |
8 | 207 | 170 | 160 | 123 |
9 | 177 | 181 | 175 | 127 |
10 | 174 | 154 | 191 | 109 |
Subject | Count | Sum | Average | Variance |
1 | 4 | 660 | 165 | 2152.667 |
2 | 4 | 612 | 153 | 596.6667 |
3 | 4 | 628 | 157 | 1008.667 |
4 | 4 | 608 | 152 | 474 |
5 | 4 | 664 | 166 | 548.6667 |
6 | 4 | 728 | 182 | 442 |
7 | 4 | 628 | 157 | 935.3333 |
8 | 4 | 660 | 165 | 1192.667 |
9 | 4 | 660 | 165 | 648 |
10 | 4 | 628 | 157 | 1252.667 |
Activity | | | | |
Treadmill | 10 | 1780 | 178 | 281.1111 |
Arm-Crank Ergometer | 10 | 1710 | 171 | 356.6667 |
Snow Shovel | 10 | 1750 | 175 | 219.1111 |
Snow Thrower | 10 | 1236 | 123.6 | 336.9333 |
