Statistical significance of a correlation tells us
a. whether it is useful in a practical situation.
b. whether it is useful for predicting a criterion.
c. how much variance the measures have in common.
d. how likely it is that the observed correlation is only a function of chance.
Ques. 2The correlation between a predictor and a criterion is .84. This means that the criterion has about ____ percent of its variance in common with the predictor.
a. 16
c. 70
b. 42
d. 84
Ques. 3If a test is going to predict a criterion well, the correlation between the test and the criterion should be
a. around .00 to indicate no errors of estimate.
b. a large, positive coefficient of correlation.
c. either a large positive or large negative correlation.
d. a large, negative coefficient of correlation.
Ques. 4What is the best way for a researcher, in an exploratory study, to show the correlations among all the variables?
a. Scattergram
b. Correlation ratio
c. Linear regression equation
d. Correlation matrix
e. Expectancy table
Ques. 5Refer to Exhibit 13-6. Do all the measures used in this study measure something in common?
a. Partial correlation
b. Factor analysis
c. Multiple regression
d. Discriminant analysis
e. Product-moment correlation
Ques. 6Refer to Exhibit 13-6. What is the correlation between the combination of independent variables and GPA at the end of the freshman year as dependent variable?
a. Partial correlation
b. Factor analysis
c. Multiple regression
d. Discriminant analysis
e. Product-moment correlation
Ques. 7Refer to Exhibit 13-6. What is the correlation between the noncognitive measure and college GPA after the influence of SAT on both variables has been removed?
a. Partial correlation
b. Factor analysis
c. Multiple regression
d. Discriminant analysis
e. Product-moment correlation
Ques. 8Refer to Exhibit 13-6. Does the combination of variables predict whether or not students successfully completed the first year of college?
a. Partial correlation
b. Factor analysis
c. Multiple regression
d. Discriminant analysis
e. Product-moment correlation
Ques. 9A researcher collects the following measures on a sample of college students: scores on the SAT and the ACT, scores on an English composition test, high school class rank, scores on a noncognitive measure, whether or not students successfully completed the first year of college (pass-fail), and their GPA. Choose the statistical procedures that the researcher should use to answer the following questions.
Refer to Exhibit 13-6. Is SAT or ACT the better single predictor of GPA?
a. Partial correlation
b. Factor analysis
c. Multiple regression
d. Discriminant analysis
e. Product-moment correlation
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