CHAPTER 5. CORRELATIONS. We have lamed that the coefficientof determination or R? is a measure of the amount of variability in one variable thatis explained by the other. Using the Grades Stats 2013 Database that you can find inthe module "Additional Information" I calculated the r test statistic for the variablesExam 1 and Exam 2. Below is the output I found when I ran the correlation in Excel:

Exami Exam2 0.650045 Note: Only pay attention to the cell highlighted in gray. The Grades Stats 2013 has the REAL scores of all the students who took Stats with me during the year 2013 (for a total of 4 quarters). Each row represents one student, and you can see how they did in Exam I and Exam 2 that year. 3.1. (1 points) Calculate R from the above data. Show your work 3.2. (1 points) What have you discovered from calculating the R' test statistic? Tell me what you think this means in terms of the relationship between Exam 1 and Exam 2 grades, Try to look at the big picture when you answer this