In a study of a weight loss program, 45 subjects lost a mean of 2.6 lbs after 12

Question

In a study of a weight loss program, 45 subjects lost a mean of 2.6 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 4 chances in 1000. Does the weight loss program have statistical significance? Does the weight loss program have practical significance? Does the weight loss program have statistical significance? A. Yes, because the results are unlikely to occur by chance. B. No, because the results are likely to occur by chance. C. Yes, because the results are likely to occur by chance. D. No, because the results are unlikely to occur by chance. Does the weight loss program have practical significance? A. No, someone starting a weight loss program would likely want to lose considerably more than 2.6 lb. B. Yes, the amount of lost weight is large enough to be considered practically significant. C. Yes, the results are too unlikely to occur by chance. D. No, the results have a chance to occur even if the weight loss program had no effect.

Explanation / Answer

Statistical significance: Option A is correct.

Practical significance: Option A is correct.

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