Examining a correlation matrix is useful when you want to (Select one)A.ensure that a regression model is not overfitting the data.B.find attributes that may have a relationship to one another.C.eliminate data that do not fit a particular model.D.computing the accuracy of a linear regression model.
Question
Examining a correlation matrix is useful when you want to (Select one)A.ensure that a regression model is not overfitting the data.B.find attributes that may have a relationship to one another.C.eliminate data that do not fit a particular model.D.computing the accuracy of a linear regression model.
Solution
Para responder a esta pregunta, es importante entender el propósito de una matriz de correlación. Vamos a analizar cada opción:
A. Asegurarse de que un modelo de regresión no esté sobreajustando los datos.
- La matriz de correlación no se utiliza directamente para determinar si un modelo de regresión está sobreajustando. El sobreajuste se evalúa generalmente mediante técnicas como la validación cruzada.
B. Encontrar atributos que pueden tener una relación entre sí.
- Esto es correcto. Una matriz de correlación muestra cómo se relacionan entre sí diferentes variables. Valores altos (positivos o negativos) indican una fuerte relación entre los atributos.
C. Eliminar datos que no se ajustan a un modelo particular.
- La matriz de correlación no se utiliza para eliminar datos. Se utiliza para entender las relaciones entre variables.
D. Calcular la precisión de un modelo de regresión lineal.
- La precisión de un modelo de regresión lineal se evalúa mediante métricas como el R², el error cuadrático medio (MSE), etc., no mediante una matriz de correlación.
Por lo tanto, la respuesta correcta es:
B. Encontrar atributos que pueden tener una relación entre sí.
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