Question

A psychology professor decides to give a quiz at the beginning of every class in hopes that it will encourage her students to do the assigned readings. However, after a few quizzes have been given, she begins to wonder if her quizzes are truly separating those students who read the material but did not understand it. To find out, she asks student to write down on their quizzes how much time they spent reading the assignment. She then ranks them in terms of the amount of time spent reading the material (X) and their grades on the quiz (Y). The following results were obtained:
Compute the rank-order correlation and indicate whether there is a significant relationship between X and Y.


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  • CreatedOctober 29, 2015
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