Unit 6, Lesson 7
El coeficiente de correlación
Matemáticas integradas 1
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Se muestra el coeficiente de correlación,
0.01
-0.34
-0.82
-0.95
Se muestra un diagrama de dispersión y la recta de mejor ajuste de los datos. ¿Cuál de los siguientes valores es la mejor estimación del coeficiente de correlación?
Graph of a scatter plot, xy-plane, origin O. Horizontal axis scale 0 to 16, by 2’s. Vertical axis scale 0 to 60, by 5’s. Best fit line from approximately (6 comma 25) to near (14 comma 50). The data fits a linear model with a positive slope.
-0.9
-0.4
0.4
0.9
Se muestran una tabla de valores y el diagrama de los residuos de la recta de mejor ajuste.
| 1 | 10 |
| 2 | 8 |
| 2.5 | 9.5 |
| 4 | 8 |
| 5 | 8 |
| 6 | 7.5 |
| 7.2 | 7 |
| 8.5 | 6 |
Graph of residuals, origin O. Horizontal axis scale 0 to 9, by 1’s. Vertical axis scale negative 1 point 5 to 1 point 5, by point 25’s. The points are discrete and have these points: (1 comma point 44), (2 comma negative 1 point 12), (2 point 5 comma point 6), (4 comma negative point 27), ( 5 comma point 2), (6 comma point 14), (7 point 2 comma point 168), (8 point 5 comma negative point 26).