A researcher used a measure of self-esteem that has a mean of 50 and a standard deviation of 10 . If 1000 respondents completed the scale, how many would she expect to score between 40 and 60 .
a. 250
b. 340
c. 500
d. 680
e. 950
In the United States, if a person has any black or African ancestry, that person is not considered white. This illustrates the concept of
a. racial constructs.
b. hypodescent.
c. relativism.
d. absolutism.
Type I is to Type II as
a. a null is to experimental
b. alpha is to beta
c. t is to F
d. accept is to reject
e. directional is to nondirectional
The effect of using random assignment is to
a. permit generalization of results to other populations.
b. create groups that are similar prior to exposure to experimental treatments.
c. reduce the possibility of experimenter bias.
d. minimize the likelihood of the Hawthorne effect.
When a college admissions office is trying to predict which students are likely to succeed if they are admitted to that college, the admissions officers are interested in seeing if there is a relationship between SAT or ACT scores and first year
grades. In this example, the SAT or ACT scores would be the
a. predictor variable.
b. measured variable.
c. confirmatory variable.
d. criterion variable.
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