Question

1. The Pearson’s correlation is used to test a relationship between two variables___________.

• A. if a non-linear relationship is tested.

• B. if a linear relationship is tested.

• C. if both variables are continuous (i.e., are measured on an interval or ratio scale).

• D. if both variables are measured on a nominal scale.

• E. A & D

• F. B & C

2. A researcher found a Pearson correlation of r = - 0.28 between self-reported stress level and intensity of physical exercise, in a sample of n = 29 individuals. In order to determine if this correlation is significant, what is the correct critical r value for p < .05 (2-tailed test)?

• A. rcritical = 0.288

• B. rcritical = 0.355

• C. rcritical = 0.361

• D. rcritical = 0. 367

• E. rcritical = 0.306

• F. rcritical = 0.311

3. If a researcher measured a person’s shoe size and self-reported anxiety, what kind of correlation is most likely to be revealed between these two variables (i.e., what correlation would you expect to find between persons’ shoe size and anxiety)?

• A. A moderate positive correlation.

• B. A correlation near 1.00.

• C. A correlation near -1.00.

• D. A moderate negative correlation.

• E. A correlation near 0.00.

4.

Suppose researchers found a Pearson’s correlation r(60) = 0.42, p < 0.01 between the length of time a person spent in prison and the amount of aggression the person displays. This finding means that spending a longer time in prison makes people more aggressive.

A. True B. False

Answer 1