Question 1

A researcher wanted to know if aggressive behavior was related to watching violent programs on TV.He selected some students and measured how many violent programs they watched per week (from 0 to 25)  and how aggressive their behavior was (as rated on a 1 to 7 scale) .What would be the most appropriate statistical analysis for these data?

Accepted Answer

A)  Bivariate regression
B)  One-way analysis of variance
C)  Multiple regression
D)  Chi-square test for independenceE) B) and C)
F) A) and C)

Question 2

In a one-way ANOVA the grand mean is defined as

Accepted Answer

A)  the between groups variance.
B)  the means across all of the participants in the study.
C)  only the means from the control group.
D)  n times the degrees of freedom.E) None of the above
F) A) and B)

Question 3

In a one-way ANOVA, eta is the measure of

Accepted Answer

A)  effect size.
B)  mean square variance.
C)  statistical significance.
D)  the interaction.E) B) and C)
F) A) and D)

Question 4

Within-group variance in an ANOVA is considered to indicate

Accepted Answer

A)  systematic error.
B)  differences among the group means.
C)  that the group means are from the same population.
D)  random error.E) A) and B)
F) A) and C)

Question 5

As the value of r increases, the proportion of variability statistic

Accepted Answer

A)  increases.
B)  decreases.
C)  does not change.
D)  may increase or decrease.E) B) and D)
F) B) and C)

Question 6

Kramer is conducting a chi-square analysis on a 2 x 2 contingency table.Which statistic should he use to calculate the effect size?

Accepted Answer

A)  Kappa
B)  Alpha
C)  Phi
D)  rE) A) and B)
F) All of the above

Question 7

The coefficient of determination indicates

Accepted Answer

A)  the proportion of variance accounted for by the correlation coefficient.
B)  whether the null hypothesis can be rejected.
C)  whether the correlation is positive or negative.
D)  whether the population has been randomly sampled.E) A) and B)
F) A) and C)

Question 8

For a 2 x 2 contingency table, the appropriate effect size statistic is

Accepted Answer

A)  r.
B)  Cohen's kappa.
C)  Phi.
D)  Cramer's statistic.E) A) and C)
F) All of the above

Question 9

The regression line measures

Accepted Answer

A)  the overall effectiveness of the dependent variable.
B)  the ability to predict a correlation coefficient.
C)  the average effect size.
D)  the best possible prediction of the dependent variableE) A) and B)
F) None of the above

Question 10

If the F value indicates that the between-groups variance estimate is significantly greater than the within-groups variance estimate in an ANOVA, we can conclude that

Accepted Answer

A)  there is random error.
B)  the group means are from the same population.
C)  the null hypothesis that the differences between the groups are due only to chance can be rejected.
D)  there was an error in the calculation.E) A) and D)
F) B) and C)

Question 11

The ratio of the between-groups variance estimate to the within-groups variance estimate is indicated by

Accepted Answer

A)  the F value.
B)  the degrees of freedom.
C)  the sum of squares.
D)  eta.E) A) and B)
F) B) and C) A

Question 12

Which of the following Pearson correlation coefficients indicates the strongest relationship between two variables?

Accepted Answer

A)  .56
B)  -.81
C)  -.05
D)  .34E) A) and B)
F) None of the above

Question 13

A negative correlation coefficient indicates that

Accepted Answer

A)  there is no relationship between the variables.
B)  high scores on one variable are associated with low scores on the other variable.
C)  high scores on one variable are associated with high scores on the other variable.
D)  it was not calculated accurately.E) A) and B)
F) A) and C)

Question 14

Researcher Jones is interested in assessing the relationship between sex of participant and helping behavior (whether the person helped or did not help) .Which of the following statistics should be used?

Accepted Answer

A)  Chi-square statistic
B)  Kappa
C)  Bivariate regression
D)  Pearson's rE) B) and D)
F) B) and C)

Question 15

A researcher calculates a regression equation in order to

Accepted Answer

A)  predict a score on a second variable from a known score on a first variable.
B)  determine the strength of the relationship between two nominal variables.
C)  predict the differences between scores on one variable from the scores on a second variable
D)  determine the causal relationship between two variables.E) None of the above
F) A) and D)

Question 16

If r =1.00, then

Accepted Answer

A)  all of the points on the scatterplot will fall on the line of best fit.
B)  there is a weak positive correlation.
C)  variable x causes variable y.
D)  the r will not be statistically significant.E) B) and C)
F) A) and B)

Question 17

What statistic is used to assess the degree of association between two nominal variables?

Accepted Answer

A)  The chi-square statistic
B)  Bivariate regression
C)  ANOVA
D)  Pearson's rE) A) and B)
F) A) and C) A

Question 18

If the F value indicates that the between-groups variance is not significantly greater than the within-groups variance in an ANOVA, we can conclude that

Accepted Answer

A)  there is random error.
B)  the group means are from the same population.
C)  the null hypothesis that the differences between the groups are due only to chance can be rejected.
D)  there was an error in the calculation.E) A) and C)
F) A) and D)

Question 19

If a correlation is positive, this indicates that __________ scores on one variable are associated with __________ scores on another variable.

Accepted Answer

A)  low; high
B)  high; low
C)  high; high
D)  high; mediumE) A) and B)
F) A) and C) C

Question 20

Which of the following statistical procedures could be used to measure the relationship between two quantitative variables?

Accepted Answer

A)  Chi-square analysis
B)  One way ANOVA
C)  Contingency table analysis
D)  Bivariate regressionE) A) and B)
F) A) and D)

Exam 17: Bivariate Statistics

Correct Answer
verified

In a one-way ANOVA the grand mean is defined as

Correct Answer
verified

In a one-way ANOVA, eta is the measure of

Correct Answer
verified

Within-group variance in an ANOVA is considered to indicate

Correct Answer
verified

As the value of r increases, the proportion of variability statistic

Correct Answer
verified

Kramer is conducting a chi-square analysis on a 2 x 2 contingency table.Which statistic should he use to calculate the effect size?

Correct Answer
verified

The coefficient of determination indicates

Correct Answer
verified

For a 2 x 2 contingency table, the appropriate effect size statistic is

Correct Answer
verified

The regression line measures

Correct Answer
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If the F value indicates that the between-groups variance estimate is significantly greater than the within-groups variance estimate in an ANOVA, we can conclude that

Correct Answer
verified

The ratio of the between-groups variance estimate to the within-groups variance estimate is indicated by

Correct Answer
verified
A

Which of the following Pearson correlation coefficients indicates the strongest relationship between two variables?

Correct Answer
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A negative correlation coefficient indicates that

Correct Answer
verified

Researcher Jones is interested in assessing the relationship between sex of participant and helping behavior (whether the person helped or did not help) .Which of the following statistics should be used?

Correct Answer
verified

A researcher calculates a regression equation in order to

Correct Answer
verified

If r =1.00, then

Correct Answer
verified

What statistic is used to assess the degree of association between two nominal variables?

Correct Answer
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A

If the F value indicates that the between-groups variance is not significantly greater than the within-groups variance in an ANOVA, we can conclude that

Correct Answer
verified

If a correlation is positive, this indicates that scores on one variable are associated with scores on another variable.

Correct Answer
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C

Which of the following statistical procedures could be used to measure the relationship between two quantitative variables?

Correct Answer
verified

Exam 17: Bivariate Statistics

Correct AnswerverifiedShow Answer

In a one-way ANOVA the grand mean is defined as

Correct AnswerverifiedShow Answer

In a one-way ANOVA, eta is the measure of

Correct AnswerverifiedShow Answer

Within-group variance in an ANOVA is considered to indicate

Correct AnswerverifiedShow Answer

As the value of r increases, the proportion of variability statistic

Correct AnswerverifiedShow Answer

Kramer is conducting a chi-square analysis on a 2 x 2 contingency table.Which statistic should he use to calculate the effect size?

Correct AnswerverifiedShow Answer

The coefficient of determination indicates

Correct AnswerverifiedShow Answer

For a 2 x 2 contingency table, the appropriate effect size statistic is

Correct AnswerverifiedShow Answer

The regression line measures

Correct AnswerverifiedShow Answer

If the F value indicates that the between-groups variance estimate is significantly greater than the within-groups variance estimate in an ANOVA, we can conclude that

Correct AnswerverifiedShow Answer

The ratio of the between-groups variance estimate to the within-groups variance estimate is indicated by

Correct AnswerverifiedA

Which of the following Pearson correlation coefficients indicates the strongest relationship between two variables?

Correct AnswerverifiedShow Answer

A negative correlation coefficient indicates that

Correct AnswerverifiedShow Answer

Researcher Jones is interested in assessing the relationship between sex of participant and helping behavior (whether the person helped or did not help) .Which of the following statistics should be used?

Correct AnswerverifiedShow Answer

A researcher calculates a regression equation in order to

Correct AnswerverifiedShow Answer

If r =1.00, then

Correct AnswerverifiedShow Answer

What statistic is used to assess the degree of association between two nominal variables?

Correct AnswerverifiedA

If the F value indicates that the between-groups variance is not significantly greater than the within-groups variance in an ANOVA, we can conclude that

Correct AnswerverifiedShow Answer

If a correlation is positive, this indicates that __________ scores on one variable are associated with __________ scores on another variable.

Correct AnswerverifiedC

Which of the following statistical procedures could be used to measure the relationship between two quantitative variables?

Correct AnswerverifiedShow Answer

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A

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A

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If a correlation is positive, this indicates that scores on one variable are associated with scores on another variable.

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C

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