Question

An independent research group is interested in the percentage of U.S. adults who do not own a credit card. From a random sample of 1500 U.S. adults, they calculate a 90% confidence interval to be (0.25, 0.31).

Select the correct interpretation of this interval in the context of the problem.

Group of answer choices:

a.) We are 90% confident that between 25% and 31% of samples like these will have sample proportions equal to the true proportion of U.S. adults who do not own a credit card.

b.) We are 90% confident that between 25% and 31% of U.S. adults do not own a credit card.

c.) We are 90% confident that between 25% and 31% of samples like these will contain adults who do not own a credit card.

d.) We are 90% confident that between 25% and 31% of our sample do not own a credit card

Answer 1

Solution:-

90% confidence interval to be (0.25, 0.31).

Conclusion:-We are 90% confident that between 25% and 31% of U.S. adults do not own a credit card.