Question 1

A researcher wants to predict score on personal happiness (Y)from score on income (X1)and number of friends (X2).Which of the following would be the proper course of action?

Accepted Answer

A) use the standardized partial slopes of X1 and X2 on Y 
B) examine the unstandardized partial slopes of X1 and X2 on Y 
C) compute the partial correlation coefficient for X1 and X2 controlling for Y 
D) examine the partial slope of Y on each independent separately

Question 2

The 'first-order' partial correlation coefficient measures

Accepted Answer

A) the bivariate relationship between X and Y. 
B) the relationship between the dependent and control variables. 
C) the bivariate relationship after controlling for the third variable. 
D) the bivariate relationship after controlling for the fourth variable.

Question 3

If the variables of interest do not meet the level of measurement requirements of partial and multiple correlation,an alternative statistical technique that would produce analogous information would be

Accepted Answer

A) Pearson's r. 
B) elaborating bivariate tables. 
C) chi square. 
D) gamma and phi.

Question 4

The multiple regression analysis of the relationship between crime and poverty used a dummy variables based on

Accepted Answer

A) region. 
B) gender. 
C) race. 
D) religion.

Question 5

Under what condition could the coefficient of multiple determination (R2)be lower in value than the zero-order correlation coefficients?

Accepted Answer

A) under no condition.This is mathematically impossible. 
B) only when all bivariate relationships are negative 
C) only when all bivariate relationships are zero 
D) only when the relationships are spurious

Question 6

If a = 17,b1 = 5,b2 = 20,X1= 100,and X2 = 200,what would the predicted Y score be?

Accepted Answer

A) 17 
B) 4,517 
C) 101 
D) 6,217

Question 7

A researcher is trying to determine if income (X1)or number of friends (X2)is more important in determining personal happiness (Y).Which of the following would be the most profitable course of action?

Accepted Answer

A) examine the standardized partial slopes of X1 and X2 on Y 
B) examine the unstandardized partial slopes of X1 and X2 on Y 
C) compute the partial correlation coefficient for X1 and X2 controlling for Y 
D) examine the partial slope of Y on each independent separately

Question 8

The text presents information from a research project on the relationships between crime,poverty,and age.After controlling for age,the relationship between crime and poverty was found to be

Accepted Answer

A) spurious. 
B) direct. 
C) interactive. 
D) intervening.

Question 9

For multivariate analysis,the techniques of partial correlation and multiple regression and correlation are superior to elaboration (i.e. ,controlling for a third variable by constructing partial tables)because

Accepted Answer

A) computations are easier. 
B) they avoid the necessity of computing Pearson's r. 
C) they provide less information and are less confusing. 
D) they provide more information.

Question 10

A Pearson's r calculated for the bivariate relationship between X and Y is .50.After controlling for Z,the partial correlation coefficient is .49.This outcome would be evidence of a(n)____ relationship between X and Y.

Accepted Answer

A) direct 
B) spurious 
C) interactive 
D) negative

Question 11

A researcher is examining the effects of income (X1)and number of friends (X2)on personal happiness (Y)and finds an R2 of 0.45.Which of the following is a correct interpretation of this result?

Accepted Answer

A) Money CAN buy happiness. 
B) Friends are more important than money for happiness. 
C) Taken together,income and number of friends explain 45% of the variance in happiness. 
D) Taken together,income and number of friends explain 0.45% of the variance in happiness.

Question 12

A Pearson's r calculated for a bivariate relationship is .50.After controlling for Z,the partial correlation coefficient is .07.This outcome would be evidence of a(n)____ relationship between X and Y.

Accepted Answer

A) direct 
B) spurious or intervening 
C) interactive 
D) positive

Question 13

In the multiple regression equation,the symbol b stands for

Accepted Answer

A) the partial slope. 
B) the slope of X and Y. 
C) the beta slope of X and Z. 
D) the Y intercept.

Question 14

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 twenty cities.Take auto theft rate as the dependent variable and conduct a full regression analysis for these three variables.
 $\begin{array}{|l|l|l|l|}
\hline \text { City } & \text { Auto Theft } & \text { Unemployment } & \% \text { YoumgMales } \
\hline \text {A } & 1500 & 8 & 10 \
\hline \text {B} & 1200 & 10 & 8 \
\hline \text {C } & 1000 & 9 & 16 \
\hline \text {D} & 1800 & 12 & 20 \
\hline \text {E} & 1000 & 9 & 12 \
\hline \text {F} & 800 & 5 & 8 \
\hline \text {H} & 600 & 4 & 7 \
\hline \text {I} & 900 & 5 & 6 \
\hline \text {J} & 1100 & 9 & 12 \
\hline \text {K} & 1300 & 10 & 15 \
\hline \text {L} & 1400 & 12 & 5 \
\hline \text {M} & 2000 & 14 & 14 \
\hline \text {N} & 1800 & 15 & 18 \
\hline \text {O} & 1100 & 9 & 10 \
\hline \text {P} & 300 & 5 & 14 \
\hline \text {Q} & 400 & 5 & 18 \
\hline \text {R} & 900 & 8 & 10 \
\hline \text {R} & 1000 & 10 & 20 \
\hline \text {T} & 1500 & 11 & 18 \
\hline \text {U} & 1600 & 16 & 16 \
\hline\
\end{array}$

Accepted Answer

The answer of The auto theft rate (number of auto...

Question 15

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.This is a ____ relationship.

Accepted Answer

A) direct 
B) statistically significant 
C) spurious 
D) interactive

Question 16

If a = 1,b1 = 10,b2 = 10,X1= 2,and X2 = 3,what would the predicted Y score be?

Accepted Answer

A) 51 
B) 26 
C) 5 
D) 0

Question 17

Which of the following would be consistent with a direct relationship between X and Y?

Accepted Answer

A) Pearson's r is .17,partial correlation coefficient is .16 
B) Pearson's r is .78,partial correlation coefficient is .50 
C) Pearson's r is .10,partial correlation coefficient is .20 
D) Pearson's r is .00,partial correlation coefficient is .00

Question 18

The partial correlation coefficient between X and Y after controlling for Z shows a much weaker relationship than the Pearson's r computed for X and Y.This would be taken as evidence of a(n)____ relationship between X and Y.

Accepted Answer

A) direct 
B) spurious or intervening 
C) interactive 
D) positive

Question 19

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

Accepted Answer

A) the partial correlation coefficients drops to zero. 
B) the partial is greater in value than the zero-order correlation coefficient. 
C) the partial correlation coefficient is negative. 
D) none of the above.Partial correlation will not detect interaction.

Question 20

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

Accepted Answer

A) Zy = a - b1*Z1 - b2Z2 
B) Zy = a + b1X1 - b2X2 
C) Zy = b1*Z1 + b2*Z2 
D) Zy = b1*Z1 - b2Z2

Exam 17: Partial Correlation and Multiple Regression and Correlation

A researcher wants to predict score on personal happiness (Y) from score on income (X₁) and number of friends (X₂) .Which of the following would be the proper course of action?

The 'first-order' partial correlation coefficient measures

If the variables of interest do not meet the level of measurement requirements of partial and multiple correlation,an alternative statistical technique that would produce analogous information would be

The multiple regression analysis of the relationship between crime and poverty used a dummy variables based on

Under what condition could the coefficient of multiple determination (R²) be lower in value than the zero-order correlation coefficients?

If a = 17,b₁ = 5,b₂ = 20,X₁= 100,and X₂ = 200,what would the predicted Y score be?

A researcher is trying to determine if income (X₁) or number of friends (X₂) is more important in determining personal happiness (Y) .Which of the following would be the most profitable course of action?

The text presents information from a research project on the relationships between crime,poverty,and age.After controlling for age,the relationship between crime and poverty was found to be

For multivariate analysis,the techniques of partial correlation and multiple regression and correlation are superior to elaboration (i.e. ,controlling for a third variable by constructing partial tables) because

A Pearson's r calculated for the bivariate relationship between X and Y is .50.After controlling for Z,the partial correlation coefficient is .49.This outcome would be evidence of a(n) ____ relationship between X and Y.

A researcher is examining the effects of income (X₁) and number of friends (X₂) on personal happiness (Y) and finds an R² of 0.45.Which of the following is a correct interpretation of this result?

A Pearson's r calculated for a bivariate relationship is .50.After controlling for Z,the partial correlation coefficient is .07.This outcome would be evidence of a(n) ____ relationship between X and Y.

In the multiple regression equation,the symbol b stands for

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.This is a ____ relationship.

If a = 1,b₁ = 10,b₂ = 10,X₁= 2,and X₂ = 3,what would the predicted Y score be?

Which of the following would be consistent with a direct relationship between X and Y?

The partial correlation coefficient between X and Y after controlling for Z shows a much weaker relationship than the Pearson's r computed for X and Y.This would be taken as evidence of a(n) ____ relationship between X and Y.

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

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

Exam 17: Partial Correlation and Multiple Regression and Correlation

A researcher wants to predict score on personal happiness (Y) from score on income (X1) and number of friends (X2) .Which of the following would be the proper course of action?

The 'first-order' partial correlation coefficient measures

If the variables of interest do not meet the level of measurement requirements of partial and multiple correlation,an alternative statistical technique that would produce analogous information would be

The multiple regression analysis of the relationship between crime and poverty used a dummy variables based on

Under what condition could the coefficient of multiple determination (R2) be lower in value than the zero-order correlation coefficients?

If a = 17,b1 = 5,b2 = 20,X1= 100,and X2 = 200,what would the predicted Y score be?

A researcher is trying to determine if income (X1) or number of friends (X2) is more important in determining personal happiness (Y) .Which of the following would be the most profitable course of action?

The text presents information from a research project on the relationships between crime,poverty,and age.After controlling for age,the relationship between crime and poverty was found to be

For multivariate analysis,the techniques of partial correlation and multiple regression and correlation are superior to elaboration (i.e. ,controlling for a third variable by constructing partial tables) because

A Pearson's r calculated for the bivariate relationship between X and Y is .50.After controlling for Z,the partial correlation coefficient is .49.This outcome would be evidence of a(n) ____ relationship between X and Y.

A researcher is examining the effects of income (X1) and number of friends (X2) on personal happiness (Y) and finds an R2 of 0.45.Which of the following is a correct interpretation of this result?

A Pearson's r calculated for a bivariate relationship is .50.After controlling for Z,the partial correlation coefficient is .07.This outcome would be evidence of a(n) ____ relationship between X and Y.

In the multiple regression equation,the symbol b stands for

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.This is a ____ relationship.

If a = 1,b1 = 10,b2 = 10,X1= 2,and X2 = 3,what would the predicted Y score be?

Which of the following would be consistent with a direct relationship between X and Y?

The partial correlation coefficient between X and Y after controlling for Z shows a much weaker relationship than the Pearson's r computed for X and Y.This would be taken as evidence of a(n) ____ relationship between X and Y.

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

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

A researcher wants to predict score on personal happiness (Y) from score on income (X₁) and number of friends (X₂) .Which of the following would be the proper course of action?

Under what condition could the coefficient of multiple determination (R²) be lower in value than the zero-order correlation coefficients?

If a = 17,b₁ = 5,b₂ = 20,X₁= 100,and X₂ = 200,what would the predicted Y score be?

A researcher is trying to determine if income (X₁) or number of friends (X₂) is more important in determining personal happiness (Y) .Which of the following would be the most profitable course of action?

A researcher is examining the effects of income (X₁) and number of friends (X₂) on personal happiness (Y) and finds an R² of 0.45.Which of the following is a correct interpretation of this result?

If a = 1,b₁ = 10,b₂ = 10,X₁= 2,and X₂ = 3,what would the predicted Y score be?