Sleep deprivation negatively affects all of the following EXCEPT

The American Psychological Association's ethical guidelines require researchers to avoid studies that involve volunteer deception

Indicate whether this statement is true or false.

Across many studies, a comparison of "black-white" IQ test scores shows that

a. the means are equal. b. the black mean is higher than the white mean. c. the black variance is equal to the white variance. d. the within-group variance is larger than the between-group variance. e. the between-group variance is greater than the within-group variance.