Test Bank for Statistics A Tool

Test Bank for Statistics A Tool for Social Research and Data Analysis 10 th Edition By Joseph Healey (All Chapters 1-15, 100% Original Verified, A+ Grade)

All Chapters Arranged Reverse: 15-1

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Chapter 15 1.Partial and multiple correlation require data which are a.nominal and continuous b.ordinal and discrete c.inferential and bivariate d.interval-ratio

ANSWER:d

REFERENCES: 406

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.

2.Partial and multiple correlation are based on a.bivariate tables.b.random sampling.c.the Analysis of Variance.d.Pearson's r.

ANSWER:d

REFERENCES: 406

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.STAT.HEAL.15.15.03 - Find and interpret standardized partial slopes or beta-weights.

3.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.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.

ANSWER:d

REFERENCES: 406

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.

4.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.direct b.spurious c.interactive d.negative

ANSWER:a

REFERENCES: 407

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients. 2 / 4

Chapter 15 5.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 a.a direct relationship between X and Y.b.a spurious relationship between X and Z.c.interaction between X, Y, and Z.d.an intervening relationship between X and Y, interaction between X and Z.

ANSWER:a

REFERENCES: 407

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.

6.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 0.33. Which of the following correctly describes this outcome? This is a relationship.a.direct b.statistically significant c.spurious d.interactive

ANSWER:a

REFERENCES: 407

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.

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

ANSWER:a

REFERENCES: 407

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.

8.After controlling for Z, a researcher finds evidence of a direct relationship between X and Y. What step should be taken next?a.Z should become the new independent variable.b.Z should become the new dependent variable.c.Z should be disregarded and a new control variable should be selected.d.Z should be disregarded and a new independent variable should be selected.

ANSWER:c

REFERENCES: 407

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients. 3 / 4

Chapter 15 9.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.a.direct b.spurious or intervening c.interactive d.positive

ANSWER:b

REFERENCES: 407-408

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.

10.Which of the following would be consistent with a spurious relationship between X and Y?a.Pearson's r is .37, partial correlation coefficient is .36.b.Pearson's r is .78, partial correlation coefficient is .30.c.Pearson's r is -.10, partial correlation coefficient is -.15.d.Pearson's r is .00, partial correlation coefficient is .00.

ANSWER:b

REFERENCES: 407-408

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.

11.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 relationship.a.direct b.statistically significant c.spurious d.interactive

ANSWER:c

REFERENCES: 407-408

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.

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.a.direct b.spurious or intervening c.interactive d.positive

ANSWER:b

REFERENCES: 407-408

LEARNING OBJECTIVES: STAT.HEAL.15.15.01 - Compute and interpret partial correlation coefficients.

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