With scores on a statistics take home exam of 10 randomly selected students and the number of days e

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?

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