SOLVED

6-31) In a twin study, if both members of a twin pair show evidence of a behavioral or personality characteristic, then the twins have a high a. probability of living long lives. b. degree of statistical significance. c. concordance rate. d. negative correlation among many additional factors. 6-32) In testing for group differences in a quasi-experiments, we would typically conduct a __________ test for nominal scale measurements, while we would conduct a __________ test for interval or ratio scale measurements. a. inferential; nonparametric b. parametric; nonparametric c. nonparametric; parametric d. parametric; descriptive 6-33) In describing the titles of journal articles, the author notes that many titles contain the phrase, “The effects of . . . .” If a title does not suggest a cause-effect connection, what might be a better phrase to use in the title? a. “The relationship between . . .” b. “The role of . . .” c. both a and b d. neither a nor b 6-34) In terms of correlational analyses, we credit Sir Francs Galton with developing the concept of a. analysis of variance b. co-relations c. independent sample t-tests d. joint probabilities 6-35) Sir Francis Galton studied the phenomenon of extreme scores in a distribution moving closer to the average score upon retesting. What is this phenomenon called? a. Regression to the mean b. Post-test outliers c. Average distributive property d. Residual analysis 6-36) In correlational research, a graph can be constructed that plots the relationship between the two variables. What is the name of this special type of graph? a. Residual plot b. Main effects plot c. Interaction plot d. Scatterplot 6-37) Julien is conducting a study where he is examining the relationship between study time and memory recall. His findings suggest that as one studies a word list for a longer amount of time, one’s recall for the items from the list improves. In correlational research, this type of finding suggests that a. increased study time causes one to memorize word lists better. b. study time is positively correlated with better recall. c. study time and recall are unrelated. d. study time is negatively correlated with better recall. 6-38) On a scatterplot, a straight line that best “fits” the data points is referred to as a(n) a. threshold line. b. histogram. c. interaction plot. d. regression line. 6-39) Sir Francis Galton noted that, on a scatterplot, a regression line’s slope portrays the __________ and __________ of the relationship between the two variables. a. strength; direction b. cause; effect c. main effect; interaction d. history; maturation 6-40) The Pearson product-moment correlation represents an index of association between two variables and falls within the range of a. 0% to 100%. b. 0 to 1.0. c. –1.0 to +1.0. d. 1 to 10.