A university is concerned about the presence of grade inflation, which is defined as an increase in the average GPA of the institution's students over time without a comparable increase Year GPA Year GPA in academic standards. To investigate this phenomenon, the average GPA for the student body was recorded over the past 11 years, as shown to the right. Complete parts a through c. 1 3.09 7 3.06 N 2.89 Co 2.97 3 2.95 9 3.16 2.86 10 3.17 OU A 2.98 11 3.16 3.01 O A O B. O C. OD. 3.5- 3.5- 3.5- 0 000 3- GPA GPA 3- GPA GPA 3- 1900 2.5-+ 2.5-ITTTTT 12 12 12 6 12 Year Yea Year Year b. Using a = 0.05, determine if the slope for the regression equation is statistically significant. Determine the null and alternative hypotheses. Ho : B Vo H , : B Vo The test statistic is t=. (Round to two decimal places as needed.) The p-value is (Round to four decimal places as needed.) The slope for the regression equation statistically significant because the p-value is than the value of a. c. What conclusions can be drawn about grade inflation over this time period