In a chi-square analysis, the _____ frequencies are determined by calculation
a. expected c. critical
b. original d. observed
A
The expected frequencies are calculated from the marginals in the contingency table.
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Research suggests that alcohol consumption during pregnancy
a. is safe as long as it is limited to one or two drinks a day b. increases the rate of fetal growth in the first trimester c. increases the amount of oxygen flowing to the fetus d. interferes with migration of neurons in the primitive neural tube
In the neuron, the electrical charge jumps the synapse. Right?
A. Yes, it is like how a spark plug works. B. Yes, but only in the central nervous system. C. Yes and no, both an electrical charge and neurotransmitters cross the synapse. D. No, neurotransmitters cross the synapse.
Which of the following statements reflects the current thinking on the issue of the relationship between mood disorders and suicide? a. Suicide is often associated with psychological disorders, especially depression
b. All people who attempt suicide have mood disorders. c. A small percentage of adolescent suicides are an expression of severe depression. d. Suicide is generally a response to some disappointment in people who are otherwise psychologically healthy.
The person's preference for any one of a group of reinforcers to occur, if the probabilities of all occurring are equal, is called the:
a. expectancy b. contingency c. reinforcement value d. positive reinforcer