Health authorities recommend aerobic exercise at a moderate-to-vigorous level for at least 2 ½hours per week along with strength training. About what percent of Americans actually practice this advice?

A woman is part of an investigation in which she is asked to take an intelligence test and then is informed that she will have to take the same test again in approximately two weeks

The method by which the investigators in this study are measuring reliability is called ________ reliability. a. test-retest b. parallel forms c. internal consistency d. split-half

Survey research generally reveals that

a. most adolescents masturbate, but most adults do not b. most people with sexual partners masturbate c. most people who live alone masturbate, but most stop after they have a sexual partner d. as a general rule, only those people without sexual partners masturbate