Extra Credit: 30 points (Show all work!) Nic wants to know if students' grades in Quantitative Statistical Analysis I are influenced by class attendance and/or students' grade level. Thus, Nic recorded the statistics grades for each student (traditional 0 to 100%) and put them in the table below. Class Attendance Grade Level Freshman Sophomore Junior X X2 X x 75 69 83 74 Good 92 89 87 88 95 96 426732 X x 71 97 42322 m 99 93 80 79 83 X Poor (missed more than 6 classes) X g 8 99 81 73 79 70 70 82 71 64 59 71 68 28 72 43 71 70 71 74 68 65 Senior a. State in words the null and alternative hypotheses. b. What are your df (you should identify 5 df s)? What are your critical F's (there should be 3)? c. What are the values of your observed F's (there should be 3)? d. Based on the above information, would you reject Ho, or fail to reject it? Why? What would your conclusions be? x