With scores on a statistics take home exam of 10 randomly selected students and the number of days each student spent working on the exam.
Days, x----- 2, 4, 1, 7,1, 3, 3, 4, 5, 2
Score, y---- 64, 79, 59, 87, 65, 77, 84, 89, 89, 70
1.) Easiest way to find r =
2.) Does a correlation exist? Why or why not?
3.) Is there a way to reference the critical value?
4.) would a Scatter plot help me support this answer of #3 question?