How can you use your personal choices to exercise more safely?
A. not exercising in high-air pollution areas
B. limiting exercise in hot climates to the early morning and evening
C. using exercise equipment as it was designed to be used
D. all of the above

Does the weight loss program have practical significance? a. no, the program is not practically significant because the results are likely to occur even if the weight loss program has no effect. b. yes, the program is practically significant because the results are too unlikely to occur by chance. c. yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant. d. no, the program is not practically significant because the amount of weight lost is trivial.