Question

determine whether the results below appear to have statistical significance, and also determine whether the results have practical significance. in a study of a weight loss program, 5 subjects lost an average of 43 lbs. methods of statistics can be used to show that if this diet had no effect, there a 23% chance of getting those results by random chance. does the weight loss program have statistical significance? a. yes, the program is statistically significant because the results are likely to occur by chance. b. no, the program is not statistically significant because the results are unlikely to occur by chance. c. no, the program is not statistically significant because the results are likely to occur by chance. d. yes, the program is statistically significant because the results are unlikely to occur by chance. does the weight loss program have practical significance? a. yes, the program is practically significant because the results are too unlikely to occur by chance. b. no, the program is not practically significant because the amount of weight lost is trivial. 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 results are likely to occur even if the weight loss program has no effect.

Explanation:

For statistical significance, a common threshold is a 5% or lower chance of results occurring by random chance. Here, there is a 23% chance of getting these results by random chance if the diet had no effect, so the results are likely to occur by chance and the program is not statistically significant. For practical significance, losing an average of 43 lbs is a large - enough amount to be considered meaningful in terms of weight loss, so the program has practical significance.

Answer:

Does the weight loss program have statistical significance?
C. No, the program is not statistically significant because the results are likely to occur by chance.
Does the weight loss program have practical significance?
C. Yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant.