The campus bookstore reported that students paid an average of $279 per semester for textbooks. To verify this statement, the student union decided to select a random sample of students and found the following amounts, in dollars, spent for textbooks: \begin{tabular}{|l|l|l|l|l|l|l|l|l|l|l|l|l|} \hline$318 & $272 & $318 & $329 & $302 & $317 & $280 & $323 & $315 & $270 & $281 & $279 & $278 \\ \hline \end{tabular} At the 0.10 significance level, can we conclude that the average amount spent on textbooks per semester has increased? a. What is the decision rule? (Round the final answer to 3 decimal places.) Reject H0:279 and accept H1:>279 when the test statistic is b. What is the value of the test statistic? (Round the final answer to 3 decimal places.) Value of the test statistic a c. What is your decision regarding H0 ? Ho. There is evidence to conclude that the mean number rate of return is higher than 279. d. What is the p-value? (Round the final answer to 4 decimal places.) p-value