in a study of a weight loss program 30 subjects lost a mean of 2.6lbs 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 6 chances in 1000. does the weight loss program have statistical significance? doses the weight loss program have practical significance?

Answer 1

If you are using P ≤ .01, it would be statistically significant. However, averaging 2.6 lbs over a year would not be practically significant. Healthy dieting would average about a pound a week.