A Psychologist Does an Experiment to Determine Whether an Outgoing $\mathrm { R } ^ { 2 }$

Multiple Choice

A psychologist does an experiment to determine whether an outgoing person can be identified by his or her handwriting.She claims that the $\mathrm { R } ^ { 2 }$ of 89% shows that this linear model is appropriate.

A) $\mathrm { R } ^ { 2 }$ does not tell whether the model is appropriate,but measures the strength of the linear relationship.High $\mathrm { R } ^ { 2 }$ could also be due to an outlier.
B) This $\mathrm { R } ^ { 2 }$ means that 89% of the dependent values will fall within one standard deviation of the mean and tells nothing about the appropriateness of the model.
C) An $\mathrm { R } ^ { 2 }$ this high means there is a very weak linear association and the model is probably inappropriate.
D) $\mathrm { R } ^ { 2 }$ does not tell whether the model is appropriate,but gives the percentage of data points that are close to the model.You can sometimes have a high $\mathrm { R } ^ { 2 }$ with a nonlinear relationship.
E) There is nothing wrong with the interpretation.