A Professor Was Interested in Determining Whether the Prices of New

question 16

Multiple Choice

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. Paired T for Bookstore - Online
$\begin{array} { l r r r r } & \mathrm { N } & \text { Mean } & \text { StDev } & \text { SE Mean } \\ \text { Bookstore } & 6 & 115.00 & 22.36 & 9.13 \\ \text { Online } & 6 & 105.83 & 13.20 & 5.39 \\ \text { Difference } & 6 & 9.17 & 13.20 & 5.39 \end{array}$
$95 \div$ lower bound for mean difference: $- 1.69$
T-Test of mean difference $= 0 ( \mathrm { vs } > 0 ) : \mathrm { T }$ -Value $= 1.70 \mathrm { P }$ -Value $= 0.075$ Based on her analysis, we can conclude at the 0.05 level of significance that

• A) The prices are the same in the bookstore and online.
• B) The prices are higher in the bookstore.
• C) The prices are higher online.
• D) The prices are different in the bookstore and online.
• E) The analysis is not conclusive.