Question 1

If r = .25,then the coefficient of determination is .06.

Accepted Answer

A) True 
 B)False  True

Question 2

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

Accepted Answer

A) True 
 B)False  False

Question 3

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   = 9.06 and   = 11,then what is the value of the correlation coefficient?

Accepted Answer

A) 0.61 
B) 0.30 
C) 0.39 
D) There is not enough information to answer this question. 
A) 0.61 
B) 0.30 
C) 0.39 
D) There is not enough information to answer this question. A

Question 4

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 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

If r = 0.65 and n = 36,then what is the value of   ?

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 7

A researcher measures the correlation of the time it take participants to complete two tasks purported to measure the same cognitive skill.Participant times are converted to ranks from fastest to slowest.If   = 165 and n = 20,then what is the decision for this correlation test?

Accepted Answer

A) Retain the null hypothesis. 
B) Reject the null hypothesis. 
C) There is not enough information to answer this question. 
A) Retain the null hypothesis. 
B) Reject the null hypothesis. 
C) There is not enough information to answer this question.

Question 8

To summarize correlations,we report the strength,the direction,and the p value for each correlation coefficient.

Accepted Answer

A) True 
 B)False

Question 9

The correlation coefficient ranges between ____ and ____.

Accepted Answer

A) 0;+1 
B) -1;0 
C) -1;+1 
D) -$\infty$;+$\infty$ 
A) 0;+1 
B) -1;0 
C) -1;+1 
D) -$\infty$;+$\infty$

Question 10

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 11

A correlation of r = .50 in a sample of 15 participants is statistically significant for a two-tailed test at a .05 level of significance.

Accepted Answer

A) True 
 B)False

Question 12

The following graphs display the data points for two linear correlations.Based on the information provided in these graphs,________ displays a negative correlation and ________ displays a stronger correlation.

Accepted Answer

A) Graph A;Graph B 
B) Graph B;Graph A 
C) Graph A;Graph A 
D) Graph B;Graph B 
A) Graph A;Graph B 
B) Graph B;Graph A 
C) Graph A;Graph A 
D) Graph B;Graph B

Question 13

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

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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 16

The phi correlation coefficient is a measure for the direction and strength of the linear relationship between two ________ variables.

Accepted Answer

A) dichotomous 
B) curvilinear 
C) ordinal 
D) significant 
A) dichotomous 
B) curvilinear 
C) ordinal 
D) significant

Question 17

The normality assumption states that the population of X and Y scores form a bivariate ("two variable")normal distribution,such that

Accepted Answer

A) the population of X and Y scores are normally distributed 
B) for each X score,the distribution of Y scores is normally distributed 
C) for each Y score,the distribution of X scores is normally distributed 
D) all of the above 
A) the population of X and Y scores are normally distributed 
B) for each X score,the distribution of Y scores is normally distributed 
C) for each Y score,the distribution of X scores is normally distributed 
D) all of the above

Question 18

A researcher measures the relationship between two variables,X and Y.If   = 340 and   = 320,000,then what is the value of the correlation coefficient?

Accepted Answer

A) 0.32 
B) 0.34 
C) 0.60 
D) almost a zero correlation 
A) 0.32 
B) 0.34 
C) 0.60 
D) almost a zero correlation

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

The numerator of the correlation coefficient measures the extent to which two variables

Accepted Answer

A) vary together 
B) vary independently 
C) covary 
D) both A and C 
A) vary together 
B) vary independently 
C) covary 
D) both A and C

If r = .25,then the coefficient of determination is .06.

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

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 = 9.06 and = 11,then what is the value of the correlation coefficient?

A correlation coefficient can ______ demonstrate cause.

Which of the following indicates the strongest correlation?

If r = 0.65 and n = 36,then what is the value of ?

A researcher measures the correlation of the time it take participants to complete two tasks purported to measure the same cognitive skill.Participant times are converted to ranks from fastest to slowest.If = 165 and n = 20,then what is the decision for this correlation test?

To summarize correlations,we report the strength,the direction,and the p value for each correlation coefficient.

The correlation coefficient ranges between and .

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?

A correlation of r = .50 in a sample of 15 participants is statistically significant for a two-tailed test at a .05 level of significance.

The following graphs display the data points for two linear correlations.Based on the information provided in these graphs, displays a negative correlation and displays a stronger correlation.

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

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

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 phi correlation coefficient is a measure for the direction and strength of the linear relationship between two ________ variables.

The normality assumption states that the population of X and Y scores form a bivariate ("two variable")normal distribution,such that

A researcher measures the relationship between two variables,X and Y.If = 340 and = 320,000,then what is the value of the correlation coefficient?

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

The numerator of the correlation coefficient measures the extent to which two variables

Introduction to Statistics

Summarizing Data: Frequency Distributions in

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Characteristics of the Sample Mean

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample T Test With Confidence Intervals

Testing Means: Two- Independent-Sample T Test With Confidence Intervals

Testing Means: Related-Samples T Test With Confidence Intervals

One-Way Analysis of Variance: Between- Subjects and Within- Subjects Repeated- Measures Designs

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

Correlation and Linear Regression

Chi-Square Tests: Goodness of Fit and the Test for Independence

Nonparametric Tests for Ordinal Data: Understanding and Interpretation

Chi-Square Tests: Goodness-of-Fit and Independence

Understanding Regression Analysis

Filters

Exam 18: Understanding Correlation Coefficients in Statistical Analysis

If r = .25,then the coefficient of determination is .06.

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

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 = 9.06 and = 11,then what is the value of the correlation coefficient?

A correlation coefficient can ______ demonstrate cause.

Which of the following indicates the strongest correlation?

If r = 0.65 and n = 36,then what is the value of ?

A researcher measures the correlation of the time it take participants to complete two tasks purported to measure the same cognitive skill.Participant times are converted to ranks from fastest to slowest.If = 165 and n = 20,then what is the decision for this correlation test?

To summarize correlations,we report the strength,the direction,and the p value for each correlation coefficient.

The correlation coefficient ranges between ____ and ____.

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?

A correlation of r = .50 in a sample of 15 participants is statistically significant for a two-tailed test at a .05 level of significance.

The following graphs display the data points for two linear correlations.Based on the information provided in these graphs,________ displays a negative correlation and ________ displays a stronger correlation.

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

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

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 phi correlation coefficient is a measure for the direction and strength of the linear relationship between two ________ variables.

The normality assumption states that the population of X and Y scores form a bivariate ("two variable")normal distribution,such that

A researcher measures the relationship between two variables,X and Y.If = 340 and = 320,000,then what is the value of the correlation coefficient?

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

The numerator of the correlation coefficient measures the extent to which two variables

Introduction to Statistics

Summarizing Data: Frequency Distributions in

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Characteristics of the Sample Mean

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: One-Sample T Test With Confidence Intervals

Testing Means: Two- Independent-Sample T Test With Confidence Intervals

Testing Means: Related-Samples T Test With Confidence Intervals

One-Way Analysis of Variance: Between- Subjects and Within- Subjects Repeated- Measures Designs

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

Correlation and Linear Regression

Chi-Square Tests: Goodness of Fit and the Test for Independence

Nonparametric Tests for Ordinal Data: Understanding and Interpretation

Chi-Square Tests: Goodness-of-Fit and Independence

Understanding Regression Analysis

Filters

The correlation coefficient ranges between and .

The following graphs display the data points for two linear correlations.Based on the information provided in these graphs, displays a negative correlation and displays a stronger correlation.