Regarding current sexual trends among young people, which of the following statements is FALSE?
a. Oral sex is seen by young people as less risky, more acceptable, and "not a big deal."
b. The chances of getting a sexually transmitted disease through oral sex are practically nil.
c. Casual sex is usually associated with alcohol use and unsafe sexual behaviors, such as unprotected sex.
d. One study found that 20 percent of American ninth graders have already had oral sex and more than 30 percent intend to try it soon.
ANSWER: b
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A statistical procedure that combines the results of different experiments to calculate an estimate of how large the effect is across different samples, experimenters, methods, etc., is called
a. multiple-t-test. b. analysis of variance. c. ANOVA. d. meta-analysis.
The best scientific theories not only explain and organize known facts, but they also ____
a. use historical perspectives b. generate predictions c. establish new facts d. discredit other theories