Calculate the correlation coefficient between the heights of fathers in inches (X) and their sons (Y)
X | 65 | 66 | 57 | 67 | 68 | 69 | 70 | 72 |
Y | 67 | 56 | 65 | 68 | 72 | 72 | 69 | 71 |
X | Y | XY | X2 | Y2 |
65 | 67 | 4355 | 4225 | 4489 |
66 | 56 | 3696 | 4356 | 3136 |
57 | 65 | 3705 | 3249 | 4225 |
67 | 68 | 4556 | 4489 | 4624 |
68 | 72 | 4896 | 4624 | 5184 |
69 | 72 | 4968 | 4761 | 5184 |
70 | 69 | 4830 | 4900 | 4761 |
72 | 71 | 5112 | 5184 | 5041 |
Note: As per textbook, correlation coefficient is 0.603. However, as per the above solution, correlation coefficient should be 0.44.