A frequency distribution in which most measurements are concentrated around the mean and fall off towards the tails, and where the two sides of the distribution are symmetrical, is called a _____ distribution.
A) normal
B) positively skewed
C) negatively skewed
D) standard
A) normal
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A national study conducted following the release of the Real Cost campaign estimated that it led to a ______ decrease in smoking initiation by youths aged 11–18.
A. 10% B. 20% C. 30% D. 40%
Because the problem of obesity has occurred across children as a group, __________.
A. it is entirely due to genetic factors B. it should probably no longer be viewed as a problem C. it is entirely due to environmental factors D. it cannot be entirely due to genetic factors
The Bakke case was significant because
a. test items had to be selected based on the proportions of correct answers given by white and non-white test takers. b. federal grants could no longer be awarded under special preference programs. c. it signified a change in attitude about affirmative action programs. d. it demonstrated the positive impact of affirmative action programs.
Vanessa, who is 40, apparently believes that she is a 20-year-old woman. Suddenly, however, she starts to speak and behave very differently, and says she no longer thinks of herself as "Vanessa." Instead, she claims to be Elise, a 10-year-old child. It is likely that Vanessa has just experienced a
A. switch. B. dissociative fugue. C. conversion reaction. D. manic episode.