Exam 13: Correlation Research

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 extent of relationship between two variables, X and Y, after the influence of a third variable, Z, has been removed.

Exhibit 13-3: Compare the following coefficients of correlation and their corresponding Ns, then answer the questions.Notice that all correlation values are statistically significant. -Refer to Exhibit 13-3.The coefficient for which the coefficient of determination equals .64?

Exhibit 13-3: Compare the following coefficients of correlation and their corresponding Ns, then answer the questions.Notice that all correlation values are statistically significant. -Refer to Exhibit 13-3.Which coefficient of correlation involves a greater number of degrees of freedom?

If the correlation between X and Y is .70, the proportion of variance in Y that is predictable from X is

Statistical significance of a correlation tells us

Research shows that aptitude scores are better predictors of achievement in the lower grades than in college.This finding can best be interpreted to mean that

A researcher uses several different measures in an attempt to predict completion of a doctoral degree in the School of Education.What type of correlational analysis would be most appropriate to predict this criterion?

A researcher who fails to reject the null hypothesis in a correlational analysis, should conclude

A measure of political conservatism was administered to representative samples of persons of ages 18, 21, 30, 45, and 60, and their respective mean scores were 65, 90, 85, 75, 70.The correlation between age and political conservatism is

Why is a Pearson's r of .6 more than twice as useful as a Pearson's r of .3?

When is multiple regression used?

A researcher wants to hold scholastic aptitude constant when investigating the relationship between need for achievement and actual achievement in the classroom.What statistical procedure should the researcher use?

The technique used to find the relationship between curvilinear variables is called

A researcher wishes to predict those college students who will be persistent in their education, that is, those who will stay in college and graduate within five years as opposed to those who will not complete a degree within five years.Which of the following methods would the researcher use?

Cohen's guidelines describe a correlation of +.50 as

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 the relationship between several independent variables and several dependent variables.

The standard error of estimate is the standard deviation of

How do college admissions officers use correlations?

When is path analysis used?

Why do correlation studies in education usually involve attribute variables?