Mathematics, 24.04.2020 17:23, kaylaamberd
The following data gives the number of hours 10 students spent studying and their corresponding grades on their midterm exams. Hours Spent Studying 0.5 1 2 2.5 3.5 4 4.5 5 5.5 6 Midterm Grades 60 63 69 72 78 81 84 87 90 96 Step 3 of 3 : Calculate the correlation coefficient, r. Round your answer to three decimal places.
Answers: 3
![r=\frac{10(2892)-(34.5)(780)}{\sqrt{[10(151.25) -(34.5)^2][10(62100) -(780)^2]}}=0.9975](/tpl/images/0624/2433/d4bd3.png)
![r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}](/tpl/images/0624/2433/ec454.png)
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The following data gives the number of hours 10 students spent studying and their corresponding grad...
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