[Solution] The data below shows the score on a promotion test given to police officers and the number of hours studied. Calculate the correlation coefficient.
Question: The data below shows the score on a promotion test given to police officers and the number of hours studied. Calculate the correlation coefficient.
| Hours Studied | Score on promotion test |
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 5 |
| 6 | 6 |
| 8 | 8 |
| 16 | 8 |
∑X = 40; ∑Y = 32; ∑XY = 262; ∑X 2 = 386; ∑Y 2 = 206
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