Question 1

The appropriate correlation coefficient for measuring the direction and strength of the linear relationship between one continuous and one dichotomous variable 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 B

Question 2

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 C

Question 3

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

Accepted Answer

A) True 
 B)False  True

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

If   = 3.84 and n = 36,then what is the value of r?

Accepted Answer

A) 0.11 
B) 0.16 
C) 0.33 
D) 0.36 
A) 0.11 
B) 0.16 
C) 0.33 
D) 0.36

Question 6

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 7

The correlation coefficient can be converted to a t statistic.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

The formula for the point-biserial correlation coefficient was derived from the formula for the Pearson correlation coefficient.

Accepted Answer

A) True 
 B)False

Question 10

Outliers can change the _____ of a correlation.

Accepted Answer

A) direction 
B) strength 
C) sign (+,-) 
D) all of the above 
A) direction 
B) strength 
C) sign (+,-) 
D) all of the above

Question 11

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 12

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

Question 13

Which of the following is the assumption that there is an equal variance of data points dispersed along the regression line?

Accepted Answer

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

Question 14

Linearity is the assumption that the best way to describe a pattern of data is using a straight line.

Accepted Answer

A) True 
 B)False

Question 15

The coefficient of determination is

Accepted Answer

A) a measure of effect size 
B) mathematically equivalent to eta-squared 
C) equal to the correlation coefficient squared 
D) all of the above 
A) a measure of effect size 
B) mathematically equivalent to eta-squared 
C) equal to the correlation coefficient squared 
D) all of the above

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

Question 17

The coefficient of determination is a measure of significance.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 20

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.

The appropriate correlation coefficient for measuring the direction and strength of the linear relationship between one continuous and one dichotomous variable is

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

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

If = 3.84 and n = 36,then what is the value of r?

A correlation coefficient can ______ demonstrate cause.

The correlation coefficient can be converted to a t statistic.

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

The formula for the point-biserial correlation coefficient was derived from the formula for the Pearson correlation coefficient.

Outliers can change the _____ of a correlation.

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

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

Which of the following is the assumption that there is an equal variance of data points dispersed along the regression line?

Linearity is the assumption that the best way to describe a pattern of data is using a straight line.

The coefficient of determination is

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

The coefficient of determination is a measure of significance.

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

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

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?

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

The appropriate correlation coefficient for measuring the direction and strength of the linear relationship between one continuous and one dichotomous variable is

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

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

If = 3.84 and n = 36,then what is the value of r?

A correlation coefficient can ______ demonstrate cause.

The correlation coefficient can be converted to a t statistic.

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

The formula for the point-biserial correlation coefficient was derived from the formula for the Pearson correlation coefficient.

Outliers can change the _____ of a correlation.

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

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

Which of the following is the assumption that there is an equal variance of data points dispersed along the regression line?

Linearity is the assumption that the best way to describe a pattern of data is using a straight line.

The coefficient of determination is

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

The coefficient of determination is a measure of significance.

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

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

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?

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