Question

In a study of a weight loss​ program, 40 subjects lost a mean of 2.4 lbs after 12 months. Methods of statistics can be used to show that if this diet had no​ effect, the likelihood of getting these results is roughly 9 chances in 1000. Does the weight loss program have statistical​ significance? Does the weight loss program have practical​ significance?

Answer 1

Yes, the program is statistically significant because there is almost no possibility for the results to take place just by chance. No, the program has no practical significance because an individual starting a weight loss program is probably expecting to lose a much higher amount of weight than just 2.4 lb.