The set of distributions that, although symmetrical and bell-shaped, are not normally distributed is known as
a. Student's t distribution
b. Gosset's t distribution.
c. the z distribution.
d. none of the options is correct
a
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Which of the following is a measure of variability?
A. mean B. variance C. standard deviation D. variance and standard deviation
Assortative mating is a phenomenon in which humans and animals:
A) mate with more than one partner to mask the paternity of the offspring. B) mate randomly with others to increase genetic variation. C) choose sexual partners based on their social status. D) choose sexual partners who are similar to the individual doing the searching.
Which of the following is one of the criteria for defining a mental disorder as spelled out in the DSM-IV-TR?
a. The disturbances involve short-term, acute distress. b. The disturbances are best explained by poverty, prejudice, or other social forces. c. The disturbances are viewed by mental health professionals as harmful, deviant, distressful, and dysfunctional. d. The disturbances have a rapid onset and are a marked change from recent functioning.
Which of the following has legitimate medical uses, but is associated with both physiological and psychological dependence and lethal overdoses?
a. Cocaine b. Barbiturates c. Heroin d. LSD