In terms of regression, which of the following is true of the best-fitting line?

A. It establishes statistical significance.

B. It increases as the correlation decreases.

C. It minimizes residuals.

D. It is rarely useful for prediction.

A corrected score for a multiple choice test is intended for...

A. Increasing the difficulty of a test

B. Decreasing the difficulty of a test

C. Decreasing the influence of accurate responding by chance alone

D. Increasing the chance of guessing correct answers

To assess the relationship between SAT scores and college GPA, why do you need variability among the students' scores and GPAs in your data?

A. To avoid the restricted range problem

B. To establish causation between the two variables

C. To avoid the third variable problem

D. To establish reliability in your measure

Which of the following is true of the relationship between reliability and validity?

A. It is possibly a highly reliable test that lacks validity.

B. If a test lacks reliability, it is important to emphasize its validity.

C. High levels of validity are often associated with low reliability.

D. There is an inverse relationship between reliability and validity.