Which of the following is a feature of a simple random sample?
a. Subjects are chosen from the population in such a way that each has an equal chance of being selected.
b. Choosing one subject increases the probability of another subject being chosen
c. Subjects within a sub-population are randomly chosen to ensure that each sub-population is adequately represented
d. Subjects consist of those who are available to participate in the study.
A
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Refer to Exhibit 7-13. The expected frequency for above-average students who want to attend college is
a. 15. c. 25. b. 20. d. 35.
Carli does not seem to have a specific attachment to her mother. In fact, she seems to treat strangers the same as her mother; she willingly approaches random strangers and asks for hugs and to be held. With which disorder would Carli most likely be diagnosed?
A. reactive attachment disorder B. autism spectrum disorder C. schizophrenia D. disinhibited social engagement disorder
What is the leading cause of death in children?
A. shaken baby syndrome B. automobile accidents C. unintentional injuries D. SIDS
Which is not a threat to external validity?
a. Unstable instrumentation. b. Artificiality of the experimental setting. c. Interaction effect of testing. d. Interference of prior treatment.