What do sleep apnea and enuresis have in common?
a. ?They are both more common in males than females.
b. ?They are both more common in adults than children.
c. ?They are both caused by obesity.
d. ?They both tend to be outgrown with time.
ANSWER:
a
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Schizophrenia is extremely rare prior to ____
a. the preschool years b. the early school years c. adolescence d. early to mid-adulthood
The median for the set of scores 6, 9, 10, 11, 15, 15 is ________
a. 9 b. 15 c. 10.5 d. 11.2
Methylphenidate is primarily used for the treatment of:
a. attention deficit hyperactivity disorder. b. drug addiction. c. schizophrenia. d. obesity.
Suppose the omnibus analysis of variance for a 2 ? 2 complex design reveals only a statistically significant main effect of one independent variable. To understand the effect of this variable the researcher should
A. compute simple main effects analyses. B. use t-tests to compare two means at a time. C. examine the means for the independent variable collapsed across the other independent variable. D. all of these