Question: SAP PLEASE 2. A) Virginia thinks that tutoring improves students' grades. To test this, she recruits a sample of 10 students and notes their grades

SAP PLEASE

2. A) Virginia thinks that tutoring improves students' grades. To test this, she recruits a sample of 10 students and notes their grades on their first exam of the semester. She then sends the 10 students to a tutor for one hour per week for the remainder of the semester. Finally, she notes these Rep same )10 students' grades on the final exam of the semester. Based on the data below, is Virginia right? (i.e., does tutoring significantly improve student grades?) Use a = .05. First Exam Final Exam 85 88 75 77 78 77 68 70 90 93 85 86 68 69 82 84 73 71 70 72 , 13 B) Based on your conclusion above, would the two-tailed 90% Confidence Interval estimating the true population mean grade difference between the first and final exams include 0 or not

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