Researchers are studying a new weight-loss program. Using a sample of 9,812 volunteers with a desire to lose weight, they construct a 95% confidence interval for the true mean amount of weight loss after six months on the program to be (0.12, 0.20) pounds.
-Based on this interval, is there statistically significant evidence that the weight-loss program works?
A) Yes, since the entire interval is positive.
B) Yes, since the sample size was large.
C) No, since the true mean amount of weight loss after six months on the program is less than a pound.
D) We cannot answer this question without a p-value.

Question

Quizplus · Accepted Answer

The confidence interval does not include 0, which means that there is statistically significant evidence that the weight-loss program works.

Researchers Are Studying a New Weight-Loss Program