Question
The following data gives the number of hours 10 students spent studying and their corresponding grades...
The following data gives the number of hours 10 students spent studying and their corresponding grades on their midterm exams.
| Hours Spent Studyin | 0 | 0.5 | 1 | 1.5 | 2 | 2.5 | 3 | 4 | 4.5 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|
| Midterm Grade | 66 | 72 | 78 | 81 | 84 | 87 | 90 | 93 | 96 | 99 |
Copy Data
Step 3 of 3 :
Calculate the correlation coefficient, r. Round your answer to three decimal places.
Homework Answers
Answer #1
| X | Y | XY | X^2 | Y^2 |
| 0 | 66 | 0 | 0 | 4356 |
| 0.5 | 72 | 36 | 0.25 | 5184 |
| 1 | 78 | 78 | 1 | 6084 |
| 1.5 | 81 | 121.5 | 2.25 | 6561 |
| 2 | 84 | 168 | 4 | 7056 |
| 2.5 | 87 | 217.5 | 6.25 | 7569 |
| 3 | 90 | 270 | 9 | 8100 |
| 4 | 93 | 372 | 16 | 8649 |
| 4.5 | 96 | 432 | 20.25 | 9216 |
| 6 | 99 | 594 | 36 | 9801 |
| n | 10 |
| sum(XY) | 2289.00 |
| sum(X) | 25.00 |
| sum(Y) | 846.00 |
| sum(X^2) | 95.00 |
| sum(Y^2) | 72576.00 |
| Numerator | 1740.00 |
| Denominator | 1806.74 |
| r | 0.9631 |
| r square | 0.9275 |
| Xbar(mean) | 2.5000 |
| Ybar(mean) | 84.6000 |
| SD(X) | 0.8539 |
| SD(Y) | 7.1414 |
| b | 5.3538 |
| a | 71.2154 |
Step 3 of 3 :
Calculate the correlation coefficient = r = 0.963
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The following data gives the number of hours 10 students spent studying and their corresponding grades...
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studying and their corresponding grades on their midterm exams.
Calculate the
correlation coefficient, r. Round your answer to three decimal
places.
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The following data gives the number of hours 10 students spent studying and their corresponding grades...
The following data gives the number of hours 10 students spent
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Copy Data
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Calculate the correlation coefficient, r. Round your answer to
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studying and their corresponding grades on their exams.
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1.5
2
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3
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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.
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Step 3 of 3 : Calculate the coefficient of determination, r2.
Round your answer to three decimal places.
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