Exam 15: Partial Correlation and Multiple Regression and Correlation

Which of the following is not a prerequisite for the use of the techniques of multiple regression and correlation

With two independent variables,the least-squares multiple regression equation would be

After controlling for Z,a researcher finds evidence of a spurious relationship between X and Y.What step should be taken next?

A researcher examines the relationship between poverty and crime rates for 100 metropolitan areas and finds a zero-order correlation of 0.37.She controls for the percent of families that are headed by single parents and finds a first order partial correlation of 0.06.Which of the following correctly describes this outcome? This is a(n)____ relationship

To investigate the combined effects of several independent variables on a single dependent variable,we use

Which of the following is a correctly stated standardized regression equation?

The regression equation for a particular relationship is Y = 10 + (.78)X₁ + (-.54)X₂.Which conclusion is consistent with this equation?

The partial correlation coefficient will reveal an interactive relationship between three variables when

When examining a bivariate relationship using Pearson's r,the partial correlation computed while using one control variable is called

After scores have been standardized,the value of a (the Y-intercept)will always be

In the multiple regression equation,the partial slopes are represented by the symbol

The auto theft rate (number of auto thefts known to the police per 100,000 population),unemployment rate,and percent of the population consisting of adolescent and young adult males (ages 12 - 25)are presented below for a sample of 20 cities.Take auto theft rate as the dependent variable and conduct a full regression analysis for these three variables. A 1500 B 1200 C 1000 D 1800 E 1000 F 800 H 600 I 900 J 1100 K 1300 L 1400 M 2000 N 1800 O 100 P 300 Q 400 R 900 S 1000 T 1500 I 1500 8 10 10 8 9 16 12 20 9 12 5 8 4 7 5 6 9 12 10 15 12 5 14 14 15 18 9 10 5 14 5 18 8 10 10 20 11 18 16 16

After controlling for Z,the partial correlation coefficient between X and Y is the same value as the bivariate Pearson's r.This pattern would be taken as evidence of

Standardized partial slopes can be computed by

In the multiple regression equation,the symbol b stands for

The techniques of multiple correlation and regression can be used

One advantage of the technique of multiple regression is that it allows the ____ effects of the ____ variables to be investigated.

A standardized regression equation is stated as: Zy = (.46)Z₁ + (.47)Z₁.Which conclusion is most consistent with this formula?

To the extent that the variables do not meet the assumptions of regression analysis,coefficients and slopes become

After controlling for Z,a researcher finds evidence of a direct relationship between X and Y.What step should be taken next?