Question
The data in the table is the number of absences for 5 students and their corresponding...
The data in the table is the number of absences for 5 students and their corresponding grade.
| Number of Absences | 5 | 8 | 9 | 10 | 11 |
|---|---|---|---|---|---|
| Grade | 90 | 78 | 74 | 62 | 58 |
Calculate the correlation coefficient, r. Round your answer to three decimal places
Homework Answers
Answer #1
The table given below ,
| Number of Absences(X) | Grade(Y) | X^2 | Y^2 | X*Y | |
| 5 | 90 | 25 | 8100 | 450 | |
| 8 | 78 | 64 | 6084 | 624 | |
| 9 | 74 | 81 | 5476 | 666 | |
| 10 | 62 | 100 | 3844 | 620 | |
| 11 | 58 | 121 | 3364 | 638 | |
| Total | 43 | 362 | 391 | 26868 | 2998 |
From table ,
Therefore , the correlation coefficient r is given by,
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