Exam 13: Correlation Research

Exhibit 13-8.Among the considerations for assessing the utility of a correlation are: absolute size and predictive validity, comparisons to other correlations, and statistical significance.Choose the appropriate consideration to answer each of the following questions. -Refer to Exhibit 13-8.In which would you compare competing predictors of success in a vocational training program?

Why does Cohen (1988) say that correlations between two variables of .5 are "about as high as they

A correlation of -.65 between test anxiety and college GPA means that

Exhibit 13-5.Choose the type of correlational statistic that would be used for each of the purposes listed. -Refer to Exhibit 13-5.Used to determine whether a set of variables can be reduced to a smaller number of measures

Consider the correlation matrix below with independent variables A, B, and C and dependent variable Y A B C Y A -- .60 .60 .70 B -- -- .00 .80 C -- -- -- .70 Which of the variables A, B, or C will enter first in a stepwise multiple regression equation?

The Pearson's product-moment correlation coefficient is used to measure the

An advantage of correlational studies is that they

In a prediction study, the standard error of estimate was equal to 6.What percentage of the actual Y scores will be within 6 points of the predicted Y scores?

In testing the hypothesis that the correlation parameter is zero, the critical value of r decreases as sample size

In which college would you expect the correlation between aptitude test score and gradepoint average to be greatest? A B C Mean Aptitude 650 775 800 Standard Deviation 71 80 68

Exhibit 13-5.Choose the type of correlational statistic that would be used for each of the purposes listed. -Refer to Exhibit 13-5.Used to describe the relationship between two variables measured on an interval scale

In which college would you expect the correlation between a verbal aptitude score and grade-point average to be highest? College College A B C Mean verbal score 510 520 528 Standard deviation 10 12 8

What is a spurious correlation? Discuss some of the factors that would result in a spurious correlation coefficient.

Exhibit 13-1: Identify the kind of correlation appropriate for use in solving each of the following problems. -Refer to Exhibit 13-1.To find the relationship between high school GPA rank and rank on a popularity measure.

Which of the following statistics is most important in the calculation of test validity and reliability?

Exhibit 13-6: A 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.What is the correlation between the noncognitive measure and college GPA after the influence of SAT on both variables has been removed?

Exhibit 13-1: Identify the kind of correlation appropriate for use in solving each of the following problems. -Refer to Exhibit 13-1.To find the relationship between male or female responses on a survey item answered "yes" or "no."

Structural equation modeling

Exhibit 13-1: Identify the kind of correlation appropriate for use in solving each of the following problems. -Refer to Exhibit 13-1.To find the relationship between achievement test and intelligence test scores.

Exhibit 13-2: Choose the correlation coefficient that matches the following types of scales. -Refer to Exhibit 13-2.Both variables are genuinely dichotomous (nominal).