Reference no: EM13582757

Question: A study reported in the Journal of the American Medical Association investigated the cardiac demands of heavy snow shoveling. Eight healthy men underwent exercise testing with 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 following table gives the heart rates in beats per minute for each of the eight subjects. At the .05 level of significance, test for any significant differences.

 Subject     Treadmill         (Arm-Crank Ergometer)      Snow Shoved             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