Lucille has been told she needs to improve her heart health, and she's ready to get started. there are many activities she is considering for her new routine, but she knows she must first calculate her target heart rate zone. when is the best time for her to begin gathering data to do this calculation?

In a study of a weight loss program, 40 subjects lost a mean of 3.0 lb after 12 months. does the weight loss program have practical significance? a. yes, because the weight loss program worked and the subjects lost a mean of 3.0 lb. b. no, because the mean weight loss of 3.0 lb after one year does not seem to justify the program. c. no, because the sample of 40 subjects was too small to determine if the program was useful. d. yes, because the mean weight loss of 3.0 lb after one year does seems to justify the program.