Question
Calculate the correlation coefficient from the following data and interpret it.
| X | 1 | 3 | 5 | 7 | 9 | 11 | 13 |
| Y | 12 | 10 | 8 | 6 | 4 | 2 | 0 |
| X | 1 | 3 | 5 | 7 | 9 | 11 | 13 |
| Y | 12 | 10 | 8 | 6 | 4 | 2 | 0 |
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(iii) 11x – y – z = 31, x – 6y + 2z = -26, x + 2y – 7z = -24
| Age (In years) | 20-25 | 25-030 | 30-35 | 35-40 | 40-45 | 45-50 |
| No. Of Employees | 30 | 40 | 60 | 50 | 46 | 14 |
| Aptitude score | 40 | 50 | 55 | 60 | 70 | 80 |
| grade points | 1.8 | 3.8 | 2.8 | 1.7 | 3.2 |