The t statistic differs from z in that
a. it applies to variances.
b. it is used when population variances are not known.
c. it involves an assumption of normality.
d. and b) but not c).
B
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The most common childhood anxiety disorder is __________.
A. selective mutism B. depression C. generalized anxiety disorder D. specific phobias
A bar graph is to a histogram as dots connected by straight lines are to a
a. diorama. b. frequency polygon. c. pictograph. d. scatterplot.
Psychologists assessed the level of emotional intelligence (EQ) in 100 couples. What would they likely find among those couples in which both scored at the high end of the scale?
a) They are more likely to divorce than other couples because opposites tend to clash. b) They had higher happiness scores than couples in which only one partner had a high EQ score. c) Contrary to expectations, high EQ scores had little connection to characteristics of the relationships. d) When both partners had high EQ scores, they were more likely to have stronger relationships with friends and relatives than with their own partner, as the partner did not need the emotional comfort.
In Levinson's destruction–creation developmental task, the midlifer
A) gives up certain youthful qualities and finds positive meaning in being older. B) must create a better balance between "masculine" and "feminine" parts of the self. C) counters past hurtful acts with a strong desire to leave a legacy for the future. D) must forge a better balance between engagement with the external world and separateness.