Coefficients Determination
1. The problem asks to find the coefficient of determination and the coefficient of nondetermination given the correlation coefficient $r=0.57$.
2. The coefficient of determination, denoted as $R^2$, is calculated by squaring the correlation coefficient:
$$R^2 = r^2$$
3. Calculate $R^2$:
$$R^2 = (0.57)^2 = 0.3249$$
This means that approximately 32.49% of the variation in $y$ can be explained by the variation in $x$.
4. The coefficient of nondetermination is the proportion of variation in $y$ that is not explained by $x$. It is calculated as:
$$1 - R^2$$
5. Calculate the coefficient of nondetermination:
$$1 - 0.3249 = 0.6751$$
This means that approximately 67.51% of the variation in $y$ is not explained by the variation in $x$.
6. Summary:
- Coefficient of determination: $0.3249$
- $32.49\%$ of the variation of $y$ is explained by the variation of $x$.
- Coefficient of nondetermination: $0.6751$
- $67.51\%$ of the variation of $y$ is not explained by the variation of $x$.
These coefficients help us understand how well $x$ predicts $y$. A higher coefficient of determination means a better fit of the model.