The id has ______ ways of obtaining gratification

If I wanted to determine, on average, how far apart any one score is from another, I should use a measure of

A) central tendency. B) correlation. C) variability. D) statistical significance.

Intelligence has a heritability coefficient of about .5 which means

a. about 50% of an individual's intelligence is due to heredity. b. about 50% of the differences in intelligence between people is due to heredity. c. about 50% of an individual's intelligence is due to environmental factors. d. about 50% of the differences in intelligence between people is unable to be measured.