In: Statistics and Probability
Calculate the coefficient of correlation, and interpret the result. (not from software or excel)
X | Y |
1870 | 3.38 |
1330 | 1.16 |
1760 | 1.58 |
1520 | 2.65 |
1300 | 1.98 |
1520 | 2.39 |
1640 | 2.49 |
1490 | 2.81 |
1300 | 2.95 |
1360 | 1.69 |
1940 | 3.49 |
1730 | 2.8 |
1790 | 2.95 |
1780 | 3.8 |
1730 | 2.64 |
1380 | 2.36 |
1580 | 3.1 |
1900 | 1.96 |
1640 | 3.08 |
1540 | 2.24 |
1350 | 2.59 |
1380 | 2.43 |
1780 | 1.95 |
1700 | 2.07 |
1610 | 2.34 |
1720 | 3.59 |
2070 | 3.59 |
1210 | 2.12 |
1720 | 2.48 |
1510 | 2.37 |
1790 | 2.1 |
2100 | 2.55 |
1690 | 3.01 |
1490 | 2.67 |
1760 | 1.87 |
1540 | 2.21 |
1810 | 2.37 |
1430 | 3.37 |
1540 | 1.84 |
1270 | 2.96 |
Following table shows the calculations:
X |
Y | X^2 | Y^2 | XY | |
1870 | 3.38 | 3496900 | 11.4244 | 6320.6 | |
1330 | 1.16 | 1768900 | 1.3456 | 1542.8 | |
1760 | 1.58 | 3097600 | 2.4964 | 2780.8 | |
1520 | 2.65 | 2310400 | 7.0225 | 4028 | |
1300 | 1.98 | 1690000 | 3.9204 | 2574 | |
1520 | 2.39 | 2310400 | 5.7121 | 3632.8 | |
1640 | 2.49 | 2689600 | 6.2001 | 4083.6 | |
1490 | 2.81 | 2220100 | 7.8961 | 4186.9 | |
1300 | 2.95 | 1690000 | 8.7025 | 3835 | |
1360 | 1.69 | 1849600 | 2.8561 | 2298.4 | |
1940 | 3.49 | 3763600 | 12.1801 | 6770.6 | |
1730 | 2.8 | 2992900 | 7.84 | 4844 | |
1790 | 2.95 | 3204100 | 8.7025 | 5280.5 | |
1780 | 3.8 | 3168400 | 14.44 | 6764 | |
1730 | 2.64 | 2992900 | 6.9696 | 4567.2 | |
1380 | 2.36 | 1904400 | 5.5696 | 3256.8 | |
1580 | 3.1 | 2496400 | 9.61 | 4898 | |
1900 | 1.96 | 3610000 | 3.8416 | 3724 | |
1640 | 3.08 | 2689600 | 9.4864 | 5051.2 | |
1540 | 2.24 | 2371600 | 5.0176 | 3449.6 | |
1350 | 2.59 | 1822500 | 6.7081 | 3496.5 | |
1380 | 2.43 | 1904400 | 5.9049 | 3353.4 | |
1780 | 1.95 | 3168400 | 3.8025 | 3471 | |
1700 | 2.07 | 2890000 | 4.2849 | 3519 | |
1610 | 2.34 | 2592100 | 5.4756 | 3767.4 | |
1720 | 3.59 | 2958400 | 12.8881 | 6174.8 | |
2070 | 3.59 | 4284900 | 12.8881 | 7431.3 | |
1210 | 2.12 | 1464100 | 4.4944 | 2565.2 | |
1720 | 2.48 | 2958400 | 6.1504 | 4265.6 | |
1510 | 2.37 | 2280100 | 5.6169 | 3578.7 | |
1790 | 2.1 | 3204100 | 4.41 | 3759 | |
2100 | 2.55 | 4410000 | 6.5025 | 5355 | |
1690 | 3.01 | 2856100 | 9.0601 | 5086.9 | |
1490 | 2.67 | 2220100 | 7.1289 | 3978.3 | |
1760 | 1.87 | 3097600 | 3.4969 | 3291.2 | |
1540 | 2.21 | 2371600 | 4.8841 | 3403.4 | |
1810 | 2.37 | 3276100 | 5.6169 | 4289.7 | |
1430 | 3.37 | 2044900 | 11.3569 | 4819.1 | |
1540 | 1.84 | 2371600 | 3.3856 | 2833.6 | |
1270 | 2.96 | 1612900 | 8.7616 | 3759.2 | |
Total | 64570 | 101.98 | 106105700 | 274.051 | 166087.1 |
Sample size : n = 40