A researcher selects a sample from a district such that 25% of the children are between ages 5 and 6, 25% are between ages 7 and 8, 25% are between 9 and 10, and 25% are between ages 11 and 12. The researcher is employing a ________ sampling.
A. convenience
B. cluster
C. quota
D. stratified random
Answer: C
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There exists a _____ between social status and immune functioning; a likely variable responsible for this finding is _____.
A) positive correlation; stress B) negative correlation; exercise C) nonassociation; genetics D) causal relationship; lifestyle choices
At a "rave" party, Marilyn used ecstasy. The physical effects of this drug include
a. low blood pressure. b. increased appetite. c. elevated body temperature. d. all of these symptoms.
Lindsay is having trouble going to sleep. Which food would be recommended for her to eat or drink if she wanted to increase her intake of tryptophan?
a. a baked potato b. a hamburger c. orange juice d. a glass of red wine
Which statement is TRUE about drug use in the United States?
a. ?The drugs used most often are illegal drugs. b. ?Nearly half of those over the age of 12 have admitted to trying an illegal substance. c. ?Illicit drug use is most common among those between the ages of 12 and 18. d. ?Drug abuse is more common among females than males.