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The following data gives the number of hours 7 students spent studying and their corresponding grades...

The following data gives the number of hours 7 students spent studying and their corresponding grades on their midterm exams.

Hours Spent Studying 0.5 1 1.5 2.5 3.5 4 4.5
Midterm Grades 69 72 75 81 84 90 96

Copy Data

Step 1 of 3 :  

Calculate the correlation coefficient, r. Round your answer to six decimal places.

Math   Statistics-And-Probability   
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Answer #1

Hours Spent Studying (x) Midterm Grades (y) x2 y2 xy
0.5 69 0.25 4761 34.5
1 72 1 5184 72
1.5 75 2.25 5625 112.5
2.5 81 6.25 6561 202.5
3.5 84 12.25 7056 294
4 90 16 8100 360
4.5 96 20.25 9216 432
17.5 567 58.25 46503 1507.5

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