When do we use the t-test (and t-distribution)?
A. When the population standard deviation is known
B. When the population standard deviation is not known
C. When the sample standard deviation is known
D. When the sample standard deviation is not known
Ans: B. When the population standard deviation is not known
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Which of the following was one of the humors that were believed to be a source of mental abnormality?
A. Urine B. Saliva C. Pus D. Bile
To measure the total number of stressors that a person is experiencing, psychologists use a __________.
A. critical events scale B. daily hassles scale C. traumatic events scale D. life events scale
According to the __________ theory of prejudice, outgroups pose not only realistic threats but also psychological and/or symbolic threats.
A. groupthink B. subordinate cooperation C. intragroup satiation D. intergroup threat
The larger the within-groups (error) variance, _____
a. the more difficult it becomes to show the effects of experimental variance b. the easier it becomes to show the effects of experimental variance c. the more difficult it becomes to perform the F test d. the easier it becomes to show a causal effect of the independent variable on the dependent variable