Question 1

A strong relationship would be represented by which of the following correlations?

Accepted Answer

A) 0.80 
B) 0.70 
C) 0.60 
D) 0.50 
A) 0.80 
B) 0.70 
C) 0.60 
D) 0.50

Question 2

Who invented the Pearson's product-moment correlation coefficient?

Accepted Answer

A) Pearson Fisher 
B) Karl Pearson 
C) Karl Fisher 
D) Fisher Pearson 
A) Pearson Fisher 
B) Karl Pearson 
C) Karl Fisher 
D) Fisher Pearson

Question 3

The Pearson's correlation coefficient examines variables that are ______ in nature.

Accepted Answer

A) continuous 
B) not continuous 
C) categorical 
D) not categorical 
A) continuous 
B) not continuous 
C) categorical 
D) not categorical

Question 4

If the correlation between variables is 0.70 the percentage of the shared variance is ______.

Accepted Answer

A) 70% 
B) 51% 
C) 49% 
D) 30% 
A) 70% 
B) 51% 
C) 49% 
D) 30%

Question 5

How is a direct correlation different from an indirect correlation?

Accepted Answer

If variables change in the sam

Question 6

Under what circumstances would you use the phi coefficient?

Accepted Answer

X = nomina

Question 7

Is a correlation of 0.6 stronger than a correlation of -0.9? Why or why not?

Accepted Answer

A correlation of -0.9 is stron

Question 8

If X increases in value as Y decreases in value,what type of correlation exists?

Accepted Answer

A) positive 
B) negative 
C) neutral 
D) none 
A) positive 
B) negative 
C) neutral 
D) none

Question 9

A mediating variable is often called ______.

Accepted Answer

A) an independent variable 
B) a dependent variable 
C) a confounding variable 
D) none of these 
A) an independent variable 
B) a dependent variable 
C) a confounding variable 
D) none of these

Question 10

When testing partial correlation,the impact of a third variable is ______.

Accepted Answer

A) added 
B) removed 
C) explored 
D) reduced 
A) added 
B) removed 
C) explored 
D) reduced

Question 11

What type of correlation exists if the less time you take to complete a test,the more items you will get wrong?

Accepted Answer

A) positive correlation 
B) direct correlation 
C) indirect correlation 
D) variable correlation 
A) positive correlation 
B) direct correlation 
C) indirect correlation 
D) variable correlation

Question 12

A correlation coefficient comparing study time to grades is +0.80.Can one then conclude that greater study time causes good grades? Why,or why not?

Accepted Answer

No,one could not conclude that

Question 13

What type of correlation exists if the less money you put in the bank,the less interest you will earn?

Accepted Answer

A) positive correlation 
B) negative correlation 
C) indirect correlation 
D) none of these 
A) positive correlation 
B) negative correlation 
C) indirect correlation 
D) none of these

Question 14

Pearson's product-moment correlation coefficient is represented by which of the following?

Accepted Answer

A) r 
B) p 
C) Σ 
D) $\mu$ 
A) r 
B) p 
C) Σ 
D) $\mu$

Question 15

If you wanted to compute the correlation between two nominal-level variables,which type of correlation should you use?

Accepted Answer

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

Question 16

What would you use to visually represent a correlation?

Accepted Answer

A) histogram 
B) polygon 
C) line graph 
D) scatterplot 
A) histogram 
B) polygon 
C) line graph 
D) scatterplot

Question 17

What type of correlation exists if the more time you spend studying,the higher your test score will be?

Accepted Answer

A) negative correlation 
B) indirect correlation 
C) direct correlation 
D) reverse correlation 
A) negative correlation 
B) indirect correlation 
C) direct correlation 
D) reverse correlation

Question 18

If the correlation between variables is 0.60,what is the coefficient of alienation?

Accepted Answer

A) 0.36 
B) 0.40 
C) 0.60 
D) 0.64 
A) 0.36 
B) 0.40 
C) 0.60 
D) 0.64

Question 19

Which of the following correlations would be interpreted a strong relationship?

Accepted Answer

A) 0.39 
B) 0.59 
C) 0.79 
D) 0.89 
A) 0.39 
B) 0.59 
C) 0.79 
D) 0.89

Question 20

If we use Spearman's rank coefficient correlation,what are the levels of measurement for both independent and dependent variables?

Accepted Answer

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

A strong relationship would be represented by which of the following correlations?

Who invented the Pearson's product-moment correlation coefficient?

The Pearson's correlation coefficient examines variables that are ______ in nature.

If the correlation between variables is 0.70 the percentage of the shared variance is ______.

How is a direct correlation different from an indirect correlation?

Under what circumstances would you use the phi coefficient?

Is a correlation of 0.6 stronger than a correlation of -0.9? Why or why not?

If X increases in value as Y decreases in value,what type of correlation exists?

A mediating variable is often called ______.

When testing partial correlation,the impact of a third variable is ______.

What type of correlation exists if the less time you take to complete a test,the more items you will get wrong?

A correlation coefficient comparing study time to grades is +0.80.Can one then conclude that greater study time causes good grades? Why,or why not?

What type of correlation exists if the less money you put in the bank,the less interest you will earn?

Pearson's product-moment correlation coefficient is represented by which of the following?

If you wanted to compute the correlation between two nominal-level variables,which type of correlation should you use?

What would you use to visually represent a correlation?

What type of correlation exists if the more time you spend studying,the higher your test score will be?

If the correlation between variables is 0.60,what is the coefficient of alienation?

Which of the following correlations would be interpreted a strong relationship?

If we use Spearman's rank coefficient correlation,what are the levels of measurement for both independent and dependent variables?

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Probability and Why It Counts: Fun With a Bell-Shaped Curve

Significantly Significant: What It Means for You and Me

Only the Lonely: the One Sample Z-Test

Teafor Two: Tests Between the Means of Different Groups

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

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Exam 5: Computing Correlation Coefficients: Ice Cream and Crime

A strong relationship would be represented by which of the following correlations?

Who invented the Pearson's product-moment correlation coefficient?

The Pearson's correlation coefficient examines variables that are ______ in nature.

If the correlation between variables is 0.70 the percentage of the shared variance is ______.

How is a direct correlation different from an indirect correlation?

Under what circumstances would you use the phi coefficient?

Is a correlation of 0.6 stronger than a correlation of -0.9? Why or why not?

If X increases in value as Y decreases in value,what type of correlation exists?

A mediating variable is often called ______.

When testing partial correlation,the impact of a third variable is ______.

What type of correlation exists if the less time you take to complete a test,the more items you will get wrong?

A correlation coefficient comparing study time to grades is +0.80.Can one then conclude that greater study time causes good grades? Why,or why not?

What type of correlation exists if the less money you put in the bank,the less interest you will earn?

Pearson's product-moment correlation coefficient is represented by which of the following?

If you wanted to compute the correlation between two nominal-level variables,which type of correlation should you use?

What would you use to visually represent a correlation?

What type of correlation exists if the more time you spend studying,the higher your test score will be?

If the correlation between variables is 0.60,what is the coefficient of alienation?

Which of the following correlations would be interpreted a strong relationship?

If we use Spearman's rank coefficient correlation,what are the levels of measurement for both independent and dependent variables?

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Probability and Why It Counts: Fun With a Bell-Shaped Curve

Significantly Significant: What It Means for You and Me

Only the Lonely: the One Sample Z-Test

Teafor Two: Tests Between the Means of Different Groups

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

Filters