Question 1

The denominator of the Pearson correlation coefficient measures the extent to which two factors vary together.

Accepted Answer

A) True 
 B)False

Question 2

A researcher measures the following correlation: r = -.21.What is the value of the coefficient of determination?

Accepted Answer

A)  .04 
B)  -.04 
C)  .42 
D)  -.42 
A)  .04 
B)  -.04 
C)  .42 
D)  -.42

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

The assumption that there is an equal variance or scatter of data points dispersed along the regression line is referred to as ______.

Accepted Answer

A)  normality 
B)  linearity 
C)  homoscedasticity 
D)  restriction of range 
A)  normality 
B)  linearity 
C)  homoscedasticity 
D)  restriction of range

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

A researcher measures the correlation between self-esteem (high,low)and physical fitness scores among school athletes.In the study,12 participants reported high self-esteem and 12 reported low self-esteem.If sY = 9.06 and MY1 - MY2 = 11,then what is the value of the correlation coefficient?

Accepted Answer

A)  .61 
B)  .30 
C)  .39 
D)  there is not enough information to answer this question 
A)  .61 
B)  .30 
C)  .39 
D)  there is not enough information to answer this question

Question 7

The formula for the phi correlation coefficient was derived from the formula for the Pearson correlation coefficient.

Accepted Answer

A) True 
 B)False

Question 8

A correlation coefficient can ______ demonstrate cause.

Accepted Answer

A)  always 
B)  never 
C)  mostly 
D)  intermittently 
A)  always 
B)  never 
C)  mostly 
D)  intermittently

Question 9

If r = .65 and n = 36,then what is the value of $\chi$2?

Accepted Answer

A)  3.84 
B)  5.99 
C)  15.21 
D)  23.40 
A)  3.84 
B)  5.99 
C)  15.21 
D)  23.40

Question 10

We convert r to a chi-square statistic for which of the following correlation tests?

Accepted Answer

A)  Pearson 
B)  Spearman 
C)  point-biserial 
D)  phi 
A)  Pearson 
B)  Spearman 
C)  point-biserial 
D)  phi

Question 11

The appropriate correlation coefficient for measuring the direction and strength of the linear relationship between two ranked or ordinal variables is ______.

Accepted Answer

A)  the Spearman correlation coefficient 
B)  the point-biserial correlation coefficient 
C)  the phi correlation coefficient 
D)  none of these 
A)  the Spearman correlation coefficient 
B)  the point-biserial correlation coefficient 
C)  the phi correlation coefficient 
D)  none of these

Question 12

Three assumptions for a correlation are homoscedasticity,linearity,and normality.

Accepted Answer

A) True 
 B)False

Question 13

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 14

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 does 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 does 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 15

Which of the following would not be reported for a correlation?

Accepted Answer

A)  the sample size 
B)  the coefficient of determination 
C)  the critical values for each test 
D)  the strength and direction of the correlation 
A)  the sample size 
B)  the coefficient of determination 
C)  the critical values for each test 
D)  the strength and direction of the correlation

Question 16

The correlation coefficient measures the extent to which changes in one factor are ______ in a second factor.

Accepted Answer

A)  related to changes 
B)  causing changes 
C)  causing variability 
D)  all of these 
A)  related to changes 
B)  causing changes 
C)  causing variability 
D)  all of these

Question 17

The point-biserial correlation coefficient is used to measure the correlation between two dichotomous variables.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 20

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

Accepted Answer

A) True 
 B)False

The denominator of the Pearson correlation coefficient measures the extent to which two factors vary together.

A researcher measures the following correlation: r = -.21.What is the value of the coefficient of determination?

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

The assumption that there is an equal variance or scatter of data points dispersed along the regression line is referred to as ______.

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

A researcher measures the correlation between self-esteem (high,low)and physical fitness scores among school athletes.In the study,12 participants reported high self-esteem and 12 reported low self-esteem.If s_Y = 9.06 and M_Y1 - M_Y2 = 11,then what is the value of the correlation coefficient?

The formula for the phi correlation coefficient was derived from the formula for the Pearson correlation coefficient.

A correlation coefficient can ______ demonstrate cause.

If r = .65 and n = 36,then what is the value of $\chi$ ²?

We convert r to a chi-square statistic for which of the following correlation tests?

The appropriate correlation coefficient for measuring the direction and strength of the linear relationship between two ranked or ordinal variables is ______.

Three assumptions for a correlation are homoscedasticity,linearity,and normality.

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

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?

Which of the following would not be reported for a correlation?

The correlation coefficient measures the extent to which changes in one factor are ______ in a second factor.

The point-biserial correlation coefficient is used to measure the correlation between two dichotomous variables.

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

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

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

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: Truehe Related-Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

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

The denominator of the Pearson correlation coefficient measures the extent to which two factors vary together.

A researcher measures the following correlation: r = -.21.What is the value of the coefficient of determination?

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

The assumption that there is an equal variance or scatter of data points dispersed along the regression line is referred to as ______.

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

A researcher measures the correlation between self-esteem (high,low)and physical fitness scores among school athletes.In the study,12 participants reported high self-esteem and 12 reported low self-esteem.If sY = 9.06 and MY1 - MY2 = 11,then what is the value of the correlation coefficient?

The formula for the phi correlation coefficient was derived from the formula for the Pearson correlation coefficient.

A correlation coefficient can ______ demonstrate cause.

If r = .65 and n = 36,then what is the value of χ\chiχ 2?

We convert r to a chi-square statistic for which of the following correlation tests?

The appropriate correlation coefficient for measuring the direction and strength of the linear relationship between two ranked or ordinal variables is ______.

Three assumptions for a correlation are homoscedasticity,linearity,and normality.

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

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?

Which of the following would not be reported for a correlation?

The correlation coefficient measures the extent to which changes in one factor are ______ in a second factor.

The point-biserial correlation coefficient is used to measure the correlation between two dichotomous variables.

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

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

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

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: Truehe Related-Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated-Measuresdesign

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

A researcher measures the correlation between self-esteem (high,low)and physical fitness scores among school athletes.In the study,12 participants reported high self-esteem and 12 reported low self-esteem.If s_Y = 9.06 and M_Y1 - M_Y2 = 11,then what is the value of the correlation coefficient?

If r = .65 and n = 36,then what is the value of $\chi$ ²?