If the null hypothesis is not rejected in a one-sample t test, then the _____
a. sample mean and the population mean differ significantly from each other
b. alpha level should be increased
c. observed difference between the sample mean and the population mean is
attributed to sampling error
d. distributions of scores within both the sample and the population are normal
C
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A relationship between variables characterized by an increase in one variable that occurs with an increase in the other variable is called a(n) ______.
A. negative relationship B. variability relationship C. noncorrelated relationship D. positive relationship
A group of people born during the same period in historical time is a(n) ______
a. peer group c. cohort b. developmental group d. age group
Webster loves playing any game in which he can show off the large vocabulary that he has acquired. A competent psychologist would suggest that this skill provides the BEST example of:
A. crystallized intelligence. B. postconventional thought. C. fluid intelligence. D. preconventional thought.
Why are the disorders listed in DSM-IV-TR Axes I and II separated rather than combined on one axis?
a) The separation provides for evaluation of continuing characteristics that should be taken into consideration. b) Insurance companies will pay for treatment of only certain disorders, so these are separated out for ease of billing. c) One axis contains disorders that can be treated; the other axis contains disorders that currently have no available treatments. d) The two sets of disorders differ in the degree to which genetic and environmental factors play a significant role in etiology.