Question 1

The relationship between chocolate sales and student happiness can be tested using the ______.

Accepted Answer

A) mean difference 
B) t statistic 
C) error difference 
D) c statistic 
A) mean difference 
B) t statistic 
C) error difference 
D) c statistic

Question 2

To examine the association between temperature and frozen yogurt sales,you hypothesize that higher temperatures will be associated with increased frozen yogurt sales.You have a ______.

Accepted Answer

A) one-tailed hypothesis 
B) two-tailed hypothesis 
C) nondirectional hypothesis 
D) invalid hypothesis 
A) one-tailed hypothesis 
B) two-tailed hypothesis 
C) nondirectional hypothesis 
D) invalid hypothesis

Question 3

What is the Greek letter $\rho$called?

Accepted Answer

A) phi 
B) alpha 
C) chi 
D) rho 
A) phi 
B) alpha 
C) chi 
D) rho

Question 4

What are the eight steps involved when examining a research question?

Accepted Answer

Step 1: State the null and research hypo

Question 5

A ______ correlation is also known as a ______ correlation.

Accepted Answer

A) negative;indirect 
B) negative;nondirectional 
C) positive;indirect 
D) positive;nondirectional 
A) negative;indirect 
B) negative;nondirectional 
C) positive;indirect 
D) positive;nondirectional

Question 6

A ______ correlation is also known as a ______ correlation.

Accepted Answer

A) negative;direct 
B) negative;nondirectional 
C) positive;direct 
D) positive;nondirectional 
A) negative;direct 
B) negative;nondirectional 
C) positive;direct 
D) positive;nondirectional

Question 7

Which of the following Greek symbols is used to represent the population estimate for a correlation coefficient?

Accepted Answer

A) $\alpha$ 
B) $\chi$ 
C) $\rho$ 
D) $\sigma$ 
A) $\alpha$ 
B) $\chi$ 
C) $\rho$ 
D) $\sigma$

Question 8

If a simple Pearson correlation value = 0.75,what percentage of variance is unaccounted for?

Accepted Answer

A) 75% 
B) 56% 
C) 44% 
D) 25% 
A) 75% 
B) 56% 
C) 44% 
D) 25%

Question 9

When computing a correlation coefficient,if you have 36 degrees of freedom,your sample size must be ______.

Accepted Answer

A) 35 
B) 34 
C) 38 
D) 37 
A) 35 
B) 34 
C) 38 
D) 37

Question 10

If a research hypothesis does not predict the direction of a relationship,the test is ______.

Accepted Answer

A) one-tailed 
B) two-tailed 
C) direct 
D) positive 
A) one-tailed 
B) two-tailed 
C) direct 
D) positive

Question 11

Which of the following represents the test statistic for a correlation coefficient?

Accepted Answer

A) t 
B) r 
C) $\varphi$ 
D) F 
A) t 
B) r 
C) $\varphi$ 
D) F

Question 12

A correlation coefficient can only test one variable at a time.

Accepted Answer

A) True 
 B)False

Question 13

What is the appropriate test statistic to use to determine the correlation coefficient?

Accepted Answer

A) t test for the correlation coefficient 
B) p test for the correlation coefficient 
C) r test for the correlation coefficient 
D) t test for statistical significance 
A) t test for the correlation coefficient 
B) p test for the correlation coefficient 
C) r test for the correlation coefficient 
D) t test for statistical significance

Question 14

The correlation coefficient can be used as its own test statistic,but what is the other appropriate test statistic often used to examine the significance of a correlation?

Accepted Answer

A) F-test 
B) Cohen's d 
C) t test 
D) $ \eta $2 
A) F-test 
B) Cohen's d 
C) t test 
D) $ \eta $2

Question 15

When the research hypothesis predicts the direction of a relationship,the test is ______.

Accepted Answer

A) one-tailed 
B) two-tailed 
C) direct 
D) positive 
A) one-tailed 
B) two-tailed 
C) direct 
D) positive

Question 16

Identify the degrees of freedom in the equation r(65) = 0.45,p < 0.05.

Accepted Answer

A) 0.35 
B) 35 
C) 0.65 
D) 65 
A) 0.35 
B) 35 
C) 0.65 
D) 65

Question 17

Another term for an indirect correlation is ______

Accepted Answer

A) a negative correlation 
B) a nondirectional correlation 
C) a positive correlation 
D) a unidirectional correlation 
A) a negative correlation 
B) a nondirectional correlation 
C) a positive correlation 
D) a unidirectional correlation

Question 18

Think about the t test for the correlation coefficient.Write the equations for a research hypothesis with a one-tailed test and for a research hypothesis with a two-tailed test.Write the equation for the null hypothesis.

Accepted Answer

One-tailed test H₁:

Question 19

When there is no prediction that a relationship between two variables will be either positive or negative,what type of test should you use?

Accepted Answer

A) two-tailed 
B) ANOVA 
C) one-tailed 
D) Cohen's d 
A) two-tailed 
B) ANOVA 
C) one-tailed 
D) Cohen's d

Question 20

Another use of correlation coefficient is to ______.

Accepted Answer

A) test mean differences 
B) test causal relationships 
C) estimate reliability 
D) estimate power 
A) test mean differences 
B) test causal relationships 
C) estimate reliability 
D) estimate power

The relationship between chocolate sales and student happiness can be tested using the ______.

To examine the association between temperature and frozen yogurt sales,you hypothesize that higher temperatures will be associated with increased frozen yogurt sales.You have a ______.

What is the Greek letter $\rho$ called?

What are the eight steps involved when examining a research question?

A correlation is also known as a correlation.

A correlation is also known as a correlation.

Which of the following Greek symbols is used to represent the population estimate for a correlation coefficient?

If a simple Pearson correlation value = 0.75,what percentage of variance is unaccounted for?

When computing a correlation coefficient,if you have 36 degrees of freedom,your sample size must be ______.

If a research hypothesis does not predict the direction of a relationship,the test is ______.

Which of the following represents the test statistic for a correlation coefficient?

A correlation coefficient can only test one variable at a time.

What is the appropriate test statistic to use to determine the correlation coefficient?

The correlation coefficient can be used as its own test statistic,but what is the other appropriate test statistic often used to examine the significance of a correlation?

When the research hypothesis predicts the direction of a relationship,the test is ______.

Identify the degrees of freedom in the equation r₍₆₅₎ = 0.45,p < 0.05.

Another term for an indirect correlation is ______

Think about the t test for the correlation coefficient.Write the equations for a research hypothesis with a one-tailed test and for a research hypothesis with a two-tailed test.Write the equation for the null hypothesis.

When there is no prediction that a relationship between two variables will be either positive or negative,what type of test should you use?

Another use of correlation coefficient is to ______.

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

Computing Correlation Coefficients: Ice Cream and Crime

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

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

Exam 15: Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

The relationship between chocolate sales and student happiness can be tested using the ______.

To examine the association between temperature and frozen yogurt sales,you hypothesize that higher temperatures will be associated with increased frozen yogurt sales.You have a ______.

What is the Greek letter ρ\rhoρ called?

What are the eight steps involved when examining a research question?

A ______ correlation is also known as a ______ correlation.

A ______ correlation is also known as a ______ correlation.

Which of the following Greek symbols is used to represent the population estimate for a correlation coefficient?

If a simple Pearson correlation value = 0.75,what percentage of variance is unaccounted for?

When computing a correlation coefficient,if you have 36 degrees of freedom,your sample size must be ______.

If a research hypothesis does not predict the direction of a relationship,the test is ______.

Which of the following represents the test statistic for a correlation coefficient?

A correlation coefficient can only test one variable at a time.

What is the appropriate test statistic to use to determine the correlation coefficient?

The correlation coefficient can be used as its own test statistic,but what is the other appropriate test statistic often used to examine the significance of a correlation?

When the research hypothesis predicts the direction of a relationship,the test is ______.

Identify the degrees of freedom in the equation r(65) = 0.45,p < 0.05.

Another term for an indirect correlation is ______

Think about the t test for the correlation coefficient.Write the equations for a research hypothesis with a one-tailed test and for a research hypothesis with a two-tailed test.Write the equation for the null hypothesis.

When there is no prediction that a relationship between two variables will be either positive or negative,what type of test should you use?

Another use of correlation coefficient is to ______.

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

Computing Correlation Coefficients: Ice Cream and Crime

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

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

What is the Greek letter $\rho$ called?

A correlation is also known as a correlation.

A correlation is also known as a correlation.

Identify the degrees of freedom in the equation r₍₆₅₎ = 0.45,p < 0.05.