Question 1

The SPSS output below shows the final table of analysis (as used in Q2-Q5). Which of the following statements is most reflective of the output?

Accepted Answer

A)  Accountants were significantly less anxious than IT technicians, but were about as anxious as sales people, and IT technicians were about as anxious as sales people. 
B)  Accountants were significantly less anxious than sales people and IT technicians, and IT technicians were significantly less anxious than sales people. 
C)  Accountants, IT technicians and sales people were all about equally anxious. 
D)  Accountants were significantly less anxious than sales people and IT technicians, and IT technicians were significantly more anxious than sales people 
A)  Accountants were significantly less anxious than IT technicians, but were about as anxious as sales people, and IT technicians were about as anxious as sales people. 
B)  Accountants were significantly less anxious than sales people and IT technicians, and IT technicians were significantly less anxious than sales people. 
C)  Accountants, IT technicians and sales people were all about equally anxious. 
D)  Accountants were significantly less anxious than sales people and IT technicians, and IT technicians were significantly more anxious than sales people D

Question 2

What is an alternative way to model the design of an ANCOVA test?

Accepted Answer

A)  Linear multiple regression with the independent variables reduced to dummy variables 
B)  Linear multiple regression with all the dependent variables and the covariate standardized 
C)  Logistic regression with the independent variables reduced to binary variables 
D)  Logistic regression with all the dependent variables and the covariate reduced to binary variables 
A)  Linear multiple regression with the independent variables reduced to dummy variables 
B)  Linear multiple regression with all the dependent variables and the covariate standardized 
C)  Logistic regression with the independent variables reduced to binary variables 
D)  Logistic regression with all the dependent variables and the covariate reduced to binary variables A

Question 3

To 'partial out' means to?

Accepted Answer

A)  Examine the model without covariates. 
B)  Control for the effect of a covariate. 
C)  Partition the covariate effects. 
D)  Partition the variance. 
A)  Examine the model without covariates. 
B)  Control for the effect of a covariate. 
C)  Partition the covariate effects. 
D)  Partition the variance. B

Question 4

Under which circumstance(s) should you avoid using analysis of covariance?

Accepted Answer

A)  If you need to control for all extraneous variables on which the groups may differ. 
B)  If you have identified variables that have not been controlled for. 
C)  If you have controlled for all possible variables. 
D)  If you need to reduce unexplained variance. 
A)  If you need to control for all extraneous variables on which the groups may differ. 
B)  If you have identified variables that have not been controlled for. 
C)  If you have controlled for all possible variables. 
D)  If you need to reduce unexplained variance.

Question 5

Adjusted group means for a sample of John Lewis customers represent.

Accepted Answer

A)  The means across all customer groups when the covariate has been accounted for 
B)  The means across the covariate 
C)  The means across each customer group that are significantly different from each other 
D)  All the means added together 
A)  The means across all customer groups when the covariate has been accounted for 
B)  The means across the covariate 
C)  The means across each customer group that are significantly different from each other 
D)  All the means added together

Question 6

An HR manager had noticed that some people 'went to pieces' during job interviews. She wanted to test whether this performance anxiety was different for people applying for jobs in different areas of the company. She took accountants, sales people and IT technicians (variable = 'job') and measured their anxiety (variable = 'anxiety') during the interview process. She also noted the seniority of the job they were applying for, ranging from level 1 (trainee) to level 8 (top management). She wanted to see whether the field of job applied for affected anxiety when controlling for position seniority. What test should she use?

Accepted Answer

A)  Analysis of covariance 
B)  Independent Analysis of Variance 
C)  Repeated-measures analysis of variance 
D)  Mixed analysis of variance 
A)  Analysis of covariance 
B)  Independent Analysis of Variance 
C)  Repeated-measures analysis of variance 
D)  Mixed analysis of variance

Question 7

The second part of SPSS output for the example in Q2 is below. Which of the following statements best reflects the effect of 'job' in the analysis?

Accepted Answer

A)  The field of job applied for had a significant effect on the level of anxiety experienced. 
B)  The field of job applied for did not have a significant effect on the level of anxiety experienced. 
C)  The field of job applied for had a significant effect on the level of anxiety experienced even after the effect of the seniority of the job had been accounted for. 
D)  The field of job applied for did not have a significant effect on the level of anxiety experienced even after the effect of the seniority of the job had been accounted for 
A)  The field of job applied for had a significant effect on the level of anxiety experienced. 
B)  The field of job applied for did not have a significant effect on the level of anxiety experienced. 
C)  The field of job applied for had a significant effect on the level of anxiety experienced even after the effect of the seniority of the job had been accounted for. 
D)  The field of job applied for did not have a significant effect on the level of anxiety experienced even after the effect of the seniority of the job had been accounted for

Question 8

The first part of the SPSS output for the example in Q2 is below. What does this part of the output suggest?

Accepted Answer

A)  The field of job did not have a significant effect on anxiety 
B)  The seniority of the job did not have a significant effect on anxiety 
C)  The variances of anxiety scores were roughly the same for the groups tested. 
D)  The variances of anxiety scores were different in the groups tested 
A)  The field of job did not have a significant effect on anxiety 
B)  The seniority of the job did not have a significant effect on anxiety 
C)  The variances of anxiety scores were roughly the same for the groups tested. 
D)  The variances of anxiety scores were different in the groups tested

Question 9

What type of analysis might you choose to implement if the assumption of homogeneity of regression slopes is violated when employing ANCOVA?

Accepted Answer

A)  Multilevel linear modelling 
B)  Any non-parametric test 
C)  Logistic regression 
D)  None of the above 
A)  Multilevel linear modelling 
B)  Any non-parametric test 
C)  Logistic regression 
D)  None of the above

Question 10

What assumption does ANCOVA have that ANOVA does not?

Accepted Answer

A)  Homogeneity of variance 
B)  Homogeneity of regression slopes 
C)  Homoscedasticity 
D)  Homogeneity of sample size 
A)  Homogeneity of variance 
B)  Homogeneity of regression slopes 
C)  Homoscedasticity 
D)  Homogeneity of sample size

Question 11

Using the SPSS output in Q4, which of the following statements best reflects what the effect of 'level' in the table tells us?

Accepted Answer

A)  The seniority of the position had a significant relationship with the level of anxiety experienced. 
B)  The seniority of the position did not have a significant relationship with the level of anxiety experienced. 
C)  The field of job applied for had a significant relationship with the seniority of the job. 
D)  The field of job applied for did not have a significant relationship with the seniority of the job. 
A)  The seniority of the position had a significant relationship with the level of anxiety experienced. 
B)  The seniority of the position did not have a significant relationship with the level of anxiety experienced. 
C)  The field of job applied for had a significant relationship with the seniority of the job. 
D)  The field of job applied for did not have a significant relationship with the seniority of the job.

Question 12

What is not true of the ANCOVA procedure in SPSS?

Accepted Answer

A)  It is part of the ANOVA procedure 
B)  It is invoked when interval-level independents (covariates) are listed in the covariates subcommand. 
C)  It can be accessed either through the Univariate or Multivariate options. 
D)  The maximum number of covariates SPSS will process is 30. 
A)  It is part of the ANOVA procedure 
B)  It is invoked when interval-level independents (covariates) are listed in the covariates subcommand. 
C)  It can be accessed either through the Univariate or Multivariate options. 
D)  The maximum number of covariates SPSS will process is 30.

Question 13

In an ANCOVA with one covariate and one independent variable, what null hypothesis is not tested?

Accepted Answer

A)  Equal slopes 
B)  Equal intercepts for each line 
C)  Equal group means 
D)  Slopes are equal to 1 
A)  Equal slopes 
B)  Equal intercepts for each line 
C)  Equal group means 
D)  Slopes are equal to 1

Question 14

Which of these statements is not true regarding the reporting of ANCOVA?

Accepted Answer

A)  It is exactly the same as reporting ANOVA. 
B)  The effect of the covariate must be reported. 
C)  Details of the F-ratio for the experimental effect and covariate should be given. 
D)  Degrees of freedom from which the F-ratio is calculated should be detailed. 
A)  It is exactly the same as reporting ANOVA. 
B)  The effect of the covariate must be reported. 
C)  Details of the F-ratio for the experimental effect and covariate should be given. 
D)  Degrees of freedom from which the F-ratio is calculated should be detailed.

Question 15

Consider the graph below. This shows the results of an experiment training condition as the independent variable and employee IQ as the covariate.
 
What does the graph indicate?

Accepted Answer

A)  Although the independent variable has had an effect on the dependent variable, the covariate is the more likely explanation of effect. 
B)  The training condition has altered IQ. 
C)  IQ has altered learning condition. 
D)  Not enough information. 
A)  Although the independent variable has had an effect on the dependent variable, the covariate is the more likely explanation of effect. 
B)  The training condition has altered IQ. 
C)  IQ has altered learning condition. 
D)  Not enough information.

Question 16

In an experiment to study the effectiveness of three different chartered accountancy courses (ACA, CIMA, ACCA) on professional accountants' career achievement, what would not be an appropriate covariate?

Accepted Answer

A)  IQ 
B)  Mathematical aptitude 
C)  Age 
D)  Height 
A)  IQ 
B)  Mathematical aptitude 
C)  Age 
D)  Height

The SPSS output below shows the final table of analysis (as used in Q2-Q5). Which of the following statements is most reflective of the output?

What is an alternative way to model the design of an ANCOVA test?

To 'partial out' means to?

Under which circumstance(s) should you avoid using analysis of covariance?

Adjusted group means for a sample of John Lewis customers represent.

The second part of SPSS output for the example in Q2 is below. Which of the following statements best reflects the effect of 'job' in the analysis?

The first part of the SPSS output for the example in Q2 is below. What does this part of the output suggest?

What type of analysis might you choose to implement if the assumption of homogeneity of regression slopes is violated when employing ANCOVA?

What assumption does ANCOVA have that ANOVA does not?

Using the SPSS output in Q4, which of the following statements best reflects what the effect of 'level' in the table tells us?

What is not true of the ANCOVA procedure in SPSS?

In an ANCOVA with one covariate and one independent variable, what null hypothesis is not tested?

Which of these statements is not true regarding the reporting of ANCOVA?

Consider the graph below. This shows the results of an experiment training condition as the independent variable and employee IQ as the covariate. What does the graph indicate?

In an experiment to study the effectiveness of three different chartered accountancy courses (ACA, CIMA, ACCA) on professional accountants' career achievement, what would not be an appropriate covariate?

Why Is My Evil Lecturer Forcing Me to Learn Statistic

The Spine of Statistics

The Phoenix of Statistics

The Ibm Spss Statistics Environment

Exploring Data With Graphs

Non-Parametric Models

Correlation

Regression

Comparing

Moderation, Mediation and Multicategory Predictors

Comparing Several Means

Factorial Anova

Repeated-Measures Designs

Mixed Design Anova

Multiple Analysis of Variance Manova

Exploratory Factor Analysis

Categorical Data

Logistic Regression

Multilevel Linear Models

Filters

Exam 13: Analysis of Covariance

The SPSS output below shows the final table of analysis (as used in Q2-Q5). Which of the following statements is most reflective of the output?

What is an alternative way to model the design of an ANCOVA test?

To 'partial out' means to?

Under which circumstance(s) should you avoid using analysis of covariance?

Adjusted group means for a sample of John Lewis customers represent.

The second part of SPSS output for the example in Q2 is below. Which of the following statements best reflects the effect of 'job' in the analysis?

The first part of the SPSS output for the example in Q2 is below. What does this part of the output suggest?

What type of analysis might you choose to implement if the assumption of homogeneity of regression slopes is violated when employing ANCOVA?

What assumption does ANCOVA have that ANOVA does not?

Using the SPSS output in Q4, which of the following statements best reflects what the effect of 'level' in the table tells us?

What is not true of the ANCOVA procedure in SPSS?

In an ANCOVA with one covariate and one independent variable, what null hypothesis is not tested?

Which of these statements is not true regarding the reporting of ANCOVA?

Consider the graph below. This shows the results of an experiment training condition as the independent variable and employee IQ as the covariate. What does the graph indicate?

In an experiment to study the effectiveness of three different chartered accountancy courses (ACA, CIMA, ACCA) on professional accountants' career achievement, what would not be an appropriate covariate?

Why Is My Evil Lecturer Forcing Me to Learn Statistic

The Spine of Statistics

The Phoenix of Statistics

The Ibm Spss Statistics Environment

Exploring Data With Graphs

Non-Parametric Models

Correlation

Regression

Comparing

Moderation, Mediation and Multicategory Predictors

Comparing Several Means

Factorial Anova

Repeated-Measures Designs

Mixed Design Anova

Multiple Analysis of Variance Manova

Exploratory Factor Analysis

Categorical Data

Logistic Regression

Multilevel Linear Models

Filters