We want to compare the scores of different groups on a measure of reaction time. Three different groups were studied: patients with recent head injuries, patients with old head injuries, and a control group of non-injured people. We want to know which group of people has the fastest reaction time. What is the best statistical test to use to find this out?
a. one-way ANOVA
b. factorial ANOVA
c. paired samples t-test
d. correlation
A
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Suppose you have a 22-year-old friend who came to North America from Korea when he was 15 and then began to learn English. If he is like the participants in Flege's study on bilingualism, he will find that
a. he will develop trouble in Korean with verb tenses and the gender of nouns, but will maintain his Korean vocabulary. b. he will lose a substantial percentage of his Korean vocabulary. c. he will have difficulty mastering English vocabulary. d. he will master English grammar as well as a Korean speaker who learned English as a 10-year-old child, as long as they both have the same amount of U.S. education.
Mary conducts research examining the efficacy of treatment of elderly persons in nursing facilities in her home state
In order for her to use this research to influence larger political policies regarding the care of the elderly on a state and federal level, she will have to generalize her findings to the larger population of elderly nursing home residents. What sort of statistics should she use to accomplish this goal? A) correlational statistics B) descriptive statistics C) inferential statistics D) logical statistics
In research conducted since the introduction of sildenafil (Viagra), studies suggest that as many as _________ of men in the United States suffer from some degree of erectile dysfunction
a) one-half b) one-third c) three-quarters d) one-quarter
Which of the following statements regarding the psychological outcomes of divorce is false?
A) Children of divorced parents are more likely to exhibit juvenile delinquency than other children. B) Children of divorced parents are more likely to be diagnosed with clinical depression than other children. C) Children of divorced parents are less likely to marry than children of continuously married parents. D) Children of divorced parents often have painful feelings about the divorce when they are college-aged.