8. The paper “Exercise Thermoregulation and Hyperprolactinaemia” (Ergonomics, 2005: 1547–1557) discussed how various aspects of exercise capacity might depend on the temperature of the environment. The accompanying data on body mass loss (kg) after exercising on a semi-recumbent cycle ergometer in three different ambient temperatures (6°C, 18°C, and 30°C) was provided by the paper’s authors.

Cold Neutral Hot 1 .4 1.2 1.6 2 .4 1.5 1.9 3 1.4 .8 1.0 4 .2 .4 .7 Subject 5 1.1 1.8 2.4 6 1.2 1.0 1.6 7 .7 1.0 1.4 8 .7 1.5 1.3 9 .8 .8 1.1

a. Does temperature affect true average body mass loss?

Carry out a test using a significance level of .01 (as did the authors of the cited paper).

b. Investigate significant differences among the temperatures