| Sample | Xi | Yi | X2 | Y2 | XY |
| 1 | 0.000 | 0.028 | 0.000 | 0.001 | 0.000 |
| 2 | 0.120 | 0.112 | 0.014 | 0.013 | 0.013 |
| 3 | 0.240 | 0.233 | 0.058 | 0.054 | 0.056 |
| 4 | 0.360 | 0.339 | 0.130 | 0.115 | 0.122 |
| 5 | 0.480 | 0.408 | 0.230 | 0.166 | 0.196 |
| 6 | 0.600 | 0.501 | 0.360 | 0.251 | 0.301 |
| Sum | 1.800 | 1.620 | 0.790 | 0.600 | 0.690 |