Question 1

Outliers can change both the direction and strength of a correlation coefficient.

Accepted Answer

A) True 
 B)False

Question 2

A researcher measures the following correlation between number of years of education and life satisfaction: r = +0.08.What is the value of the coefficient of determination?

Accepted Answer

A) 0.08 
B) 0.16 
C) 0.01 
D) 0.11 
A) 0.08 
B) 0.16 
C) 0.01 
D) 0.11

Question 3

The coefficient of determination is mathematically equivalent to

Accepted Answer

A) the correlation coefficient 
B) omega-squared 
C) eta-squared 
D) both B and C 
A) the correlation coefficient 
B) omega-squared 
C) eta-squared 
D) both B and C

Question 4

The correlation coefficient is used to measure the ________ and ________ of the linear relationship between two factors.

Accepted Answer

A) date;time 
B) mean;variance 
C) significance;effect size 
D) strength;direction 
A) date;time 
B) mean;variance 
C) significance;effect size 
D) strength;direction

Question 5

Which of the following indicates the strongest correlation?

Accepted Answer

A) r = -0.57 
B) r = +0.78 
C) r = -0.90 
D) r = +0.88 
A) r = -0.57 
B) r = +0.78 
C) r = -0.90 
D) r = +0.88

Question 6

The appropriate correlation coefficient for measuring for the direction and strength of the linear relationship between two dichotomous variables is

Accepted Answer

A) the Spearman rank-order correlation coefficient 
B) the point-biserial correlation coefficient 
C) the phi correlation coefficient 
D) none of the above 
A) the Spearman rank-order correlation coefficient 
B) the point-biserial correlation coefficient 
C) the phi correlation coefficient 
D) none of the above

Question 7

The correlation coefficient can be converted to a chi-square statistic.

Accepted Answer

A) True 
 B)False

Question 8

When we compute many correlations in a single study,we report each correlation coefficient in a table called a correlation matrix.

Accepted Answer

A) True 
 B)False

Question 9

The most common measure of effect size for the correlation coefficient is called

Accepted Answer

A) the correlation coefficient 
B) the coefficient of determination 
C) estimated Cohen's d 
D) the test statistic 
A) the correlation coefficient 
B) the coefficient of determination 
C) estimated Cohen's d 
D) the test statistic

Question 10

If r = 0.026 and df = 10,then t = 7.20.

Accepted Answer

A) True 
 B)False

Question 11

A statistical procedure used to describe the strength and direction of the linear relationship between two factors is called

Accepted Answer

A) effect size 
B) power 
C) a correlation 
D) coincidence 
A) effect size 
B) power 
C) a correlation 
D) coincidence

Question 12

The assumption of normality requires that the range of scores observed in a sample is the same of the possible range of scores in the population.

Accepted Answer

A) True 
 B)False

Question 13

A researcher measures the following correlation between cost of produce and number of units sold.Which description best explains the relationship between these two factors?

Accepted Answer

A) As the cost of produce increases,so also do the number of units sold. 
B) Less expensive produce is associated with an increased number of units sold. 
C) Less expensive produce is associated with a decreased number of units sold. 
D) No linear pattern is evident. 
A) As the cost of produce increases,so also do the number of units sold. 
B) Less expensive produce is associated with an increased number of units sold. 
C) Less expensive produce is associated with a decreased number of units sold. 
D) No linear pattern is evident.

Question 14

The correlation coefficient varies between 0 and 1 and can never be negative.

Accepted Answer

A) True 
 B)False

Question 15

The Spearman rank-order correlation coefficient is a measure of the direction and strength of the linear relationship between two ________ variables.

Accepted Answer

A) nominal 
B) ordinal 
C) interval 
D) ratio 
A) nominal 
B) ordinal 
C) interval 
D) ratio

Question 16

A researcher measures the relationship between narcissism and willingness to help.If   = 240,   = 320,and   = 410,then what is the value of the correlation coefficient?

Accepted Answer

A) 0.002 
B) 0.02 
C) 0.66 
D) 0.69 
A) 0.002 
B) 0.02 
C) 0.66 
D) 0.69

Question 17

The phi correlation coefficient is used to measure the correlation between two ordinal variables.

Accepted Answer

A) True 
 B)False

Question 18

To summarize correlations,we report:

Accepted Answer

A) the strength of the correlation 
B) the direction of the correlation 
C) the p value 
D) all of the above 
A) the strength of the correlation 
B) the direction of the correlation 
C) the p value 
D) all of the above

Question 19

What is the problem with the following data for computing a correlation?

Accepted Answer

A) The correlation coefficient will equal 0 because it violates the assumption of normality. 
B) The correlation coefficient will equal 1.0 because it violates the assumption of normality. 
C) The correlation coefficient will equal 0 because it violates the assumption of linearity. 
D) The correlation coefficient will equal 1.0 because it violates the assumption of linearity. 
A) The correlation coefficient will equal 0 because it violates the assumption of normality. 
B) The correlation coefficient will equal 1.0 because it violates the assumption of normality. 
C) The correlation coefficient will equal 0 because it violates the assumption of linearity. 
D) The correlation coefficient will equal 1.0 because it violates the assumption of linearity.

Question 20

The sign (+ or -)of a correlation coefficient indicates the direction of a relationship between two factors.

Accepted Answer

A) True 
 B)False

Outliers can change both the direction and strength of a correlation coefficient.

A researcher measures the following correlation between number of years of education and life satisfaction: r = +0.08.What is the value of the coefficient of determination?

The coefficient of determination is mathematically equivalent to

The correlation coefficient is used to measure the and of the linear relationship between two factors.

Which of the following indicates the strongest correlation?

The appropriate correlation coefficient for measuring for the direction and strength of the linear relationship between two dichotomous variables is

The correlation coefficient can be converted to a chi-square statistic.

When we compute many correlations in a single study,we report each correlation coefficient in a table called a correlation matrix.

The most common measure of effect size for the correlation coefficient is called

If r = 0.026 and df = 10,then t = 7.20.

A statistical procedure used to describe the strength and direction of the linear relationship between two factors is called

The assumption of normality requires that the range of scores observed in a sample is the same of the possible range of scores in the population.

A researcher measures the following correlation between cost of produce and number of units sold.Which description best explains the relationship between these two factors?

The correlation coefficient varies between 0 and 1 and can never be negative.

The Spearman rank-order correlation coefficient is a measure of the direction and strength of the linear relationship between two ________ variables.

A researcher measures the relationship between narcissism and willingness to help.If = 240, = 320,and = 410,then what is the value of the correlation coefficient?

The phi correlation coefficient is used to measure the correlation between two ordinal variables.

To summarize correlations,we report:

What is the problem with the following data for computing a correlation?

The sign (+ or -)of a correlation coefficient indicates the direction of a relationship between two factors.

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability

Probability, Normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample and Two-Independent Sample T Tests

Testing Means: Related Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated Measures Design

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters

Exam 15: Correlation

Outliers can change both the direction and strength of a correlation coefficient.

A researcher measures the following correlation between number of years of education and life satisfaction: r = +0.08.What is the value of the coefficient of determination?

The coefficient of determination is mathematically equivalent to

The correlation coefficient is used to measure the ________ and ________ of the linear relationship between two factors.

Which of the following indicates the strongest correlation?

The appropriate correlation coefficient for measuring for the direction and strength of the linear relationship between two dichotomous variables is

The correlation coefficient can be converted to a chi-square statistic.

When we compute many correlations in a single study,we report each correlation coefficient in a table called a correlation matrix.

The most common measure of effect size for the correlation coefficient is called

If r = 0.026 and df = 10,then t = 7.20.

A statistical procedure used to describe the strength and direction of the linear relationship between two factors is called

The assumption of normality requires that the range of scores observed in a sample is the same of the possible range of scores in the population.

A researcher measures the following correlation between cost of produce and number of units sold.Which description best explains the relationship between these two factors?

The correlation coefficient varies between 0 and 1 and can never be negative.

The Spearman rank-order correlation coefficient is a measure of the direction and strength of the linear relationship between two ________ variables.

A researcher measures the relationship between narcissism and willingness to help.If = 240, = 320,and = 410,then what is the value of the correlation coefficient?

The phi correlation coefficient is used to measure the correlation between two ordinal variables.

To summarize correlations,we report:

What is the problem with the following data for computing a correlation?

The sign (+ or -)of a correlation coefficient indicates the direction of a relationship between two factors.

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability

Probability, Normal Distributions, and Z Scores

Probability and Sampling Distributions

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample and Two-Independent Sample T Tests

Testing Means: Related Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated Measures Design

Analysis of Variance: Two-Way Between-Subjects Factorial Design

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

Filters

The correlation coefficient is used to measure the and of the linear relationship between two factors.