Measure the height of your classmates. Ask them the height of their benchmate. Calculate the correlation coefficient of these two variables. Interpret the result.
Height of Classmate X | Height of Benchmate Y |
67 | 65 |
56 | 66 |
65 | 57 |
68 | 67 |
72 | 68 |
72 | 69 |
69 | 70 |
71 | 72 |
X | Y | XY | X2 | Y2 |
67 | 65 | 4355 | 4489 | 4225 |
56 | 66 | 3696 | 3136 | 4356 |
65 | 57 | 3705 | 4225 | 3249 |
68 | 67 | 4556 | 4624 | 4489 |
72 | 68 | 4896 | 5184 | 4624 |
72 | 69 | 4968 | 5184 | 4761 |
69 | 70 | 4830 | 4761 | 4900 |
71 | 72 | 5112 | 5041 | 5184 |