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.

Are these results practically important?

Yes, since the entire interval is positive.

Yes, since the results are statistically significant.

No, since the true mean amount of weight loss after six months on the program is less than a pound.

We cannot answer this question without a p-value.