A professor was interested in determining whether the prices of new textbooks in the bookstore were higher than if purchased online. She selected 6 textbooks and priced each at the bookstore and online. Which statement is true at 5% significance level?
A) There is not enough evidence to suggest that the prices of new textbooks in the bookstore were higher than if purchased online, on average.
B) There is strong evidence that the prices are higher in the bookstore.
C) We are 95% sure that the prices are higher online.
D) There is strong evidence that the prices in the bookstore and online are different.
E) We are 95% sure that the prices in the bookstore and online are exactly the same.

Question

A professor was interested in determining whether the prices of new textbooks in the bookstore were higher than if purchased online. She selected 6 textbooks and priced each at the bookstore and online. Which statement is true at 5% significance level? 
A) There is not enough evidence to suggest that the prices of new textbooks in the bookstore were higher than if purchased online, on average. 
B) There is strong evidence that the prices are higher in the bookstore. 
C) We are 95% sure that the prices are higher online. 
D) There is strong evidence that the prices in the bookstore and online are different. 
E) We are 95% sure that the prices in the bookstore and online are exactly the same.

Quizplus · Accepted Answer

To determine whether the prices of new textbooks in the bookstore were higher than if purchased online, a hypothesis test should be conducted. However, the problem statement does not provide the sample means, standard deviations or any other statistical measures required to perform a hypothesis test. Therefore, we cannot reject the null hypothesis that there is no difference between the prices of new textbooks in the bookstore and if purchased online. Thus, statement A is the correct choice.

A Professor Was Interested in Determining Whether the Prices of New