Question 1

When conducting a hypothesis test for the Pearson correlation coefficient, degrees of freedom is calculated by:

Accepted Answer

A)  $\ \Sigma$(X - MX)2. 
B)  (N1 - 1)(N2 - 1). 
C)  N - 1. 
D)  N - 2. 
A)  $\ \Sigma$(X - MX)2. 
B)  (N1 - 1)(N2 - 1). 
C)  N - 1. 
D)  N - 2. D

Question 2

Which of these values indicates the strongest relationship between two variables?

Accepted Answer

A)  0.65 
B)  0.59 
C)  -0.25 
D)  -0.72 
A)  0.65 
B)  0.59 
C)  -0.25 
D)  -0.72 D

Question 3

When conducting a hypothesis test for the Pearson correlation coefficient, the null hypothesis states that there is _______ between the two variables.

Accepted Answer

A)  a correlation 
B)  no correlation 
C)  a positive correlation 
D)  a negative correlation 
A)  a correlation 
B)  no correlation 
C)  a positive correlation 
D)  a negative correlation B

Question 4

Test-retest reliability is intended to measure a person's, not a test's, consistency over time.

Accepted Answer

A) True 
 B)False

Question 5

The most widely used measure of reliability is:

Accepted Answer

A)  the split-half correlation, in which the odd and even numbered items of a measure are correlated to assess internal consistency. 
B)  coefficient alpha, the average of all possible split-half correlations. 
C)  the test-retest reliability. 
D)  criterion-related reliability. 
A)  the split-half correlation, in which the odd and even numbered items of a measure are correlated to assess internal consistency. 
B)  coefficient alpha, the average of all possible split-half correlations. 
C)  the test-retest reliability. 
D)  criterion-related reliability.

Question 6

A researcher examines the relationship between an individual's adjustment to becoming a parent and his or her age, while removing the influence of financial status.What procedure would allow such an analysis?

Accepted Answer

A)  correlation 
B)  split-half reliability 
C)  Cronbach's alpha 
D)  partial correlation 
A)  correlation 
B)  split-half reliability 
C)  Cronbach's alpha 
D)  partial correlation

Question 7

The correlation coefficient is how one measures the _____ of a correlation.

Accepted Answer

A)  causal relationship 
B)  outcome 
C)  strength 
D)  interval 
A)  causal relationship 
B)  outcome 
C)  strength 
D)  interval

Question 8

The correlation coefficient between the two variables, ear size and IQ score, is zero.What does this statement mean?

Accepted Answer

A)  The scores of the two variables are evenly matched. 
B)  As the value of one variable changes, the other is not necessarily affected. 
C)  As the value of one variable changes, the other increases. 
D)  As the value of one variable changes, the other decreases. 
A)  The scores of the two variables are evenly matched. 
B)  As the value of one variable changes, the other is not necessarily affected. 
C)  As the value of one variable changes, the other increases. 
D)  As the value of one variable changes, the other decreases.

Question 9

When performing a hypothesis test for correlation, one tests the null hypothesis that $\rho  $ $\neq  $ 0.0.

Accepted Answer

A) True 
 B)False

Question 10

The denominator of the Pearson correlation equation corrects for _____ and _____ issues present in the numerator.

Accepted Answer

A)  sample size; variability 
B)  sample size; non-normality 
C)  negative values; variability 
D)  negative values; nonlinear data 
A)  sample size; variability 
B)  sample size; non-normality 
C)  negative values; variability 
D)  negative values; nonlinear data

Question 11

Use the following to answer questions 
The relation between a hockey player's age and the number of minutes he spent in the penalty box during the regular 2006-2007 season is shown in the figure.The 18 players were members of the New Jersey Devils hockey team who played in more than 40 games that season.
Figure: Age and Penalty Minutes  
-(Figure: Age and Penalty Minutes) Based on the scatterplot, it appears that as a hockey player's age increases, the number of minutes spent in the penalty box:

Accepted Answer

A)  increases. 
B)  decreases. 
C)  remains the same. 
D)  is unrelated. 
A)  increases. 
B)  decreases. 
C)  remains the same. 
D)  is unrelated.

Question 12

Based on research with her patients, Dr.Sabine knows that the correlation coefficient between scores on an anxiety scale and comfort at a social gathering is -0.35.If the critical value for r is 0.330, what should she conclude?

Accepted Answer

A)  The null hypothesis should be retained. 
B)  Scores on the anxiety scale are significantly related to feelings of comfort in a social gathering. 
C)  Scores on the anxiety scale are not significantly related to feelings of comfort in a social gathering. 
D)  Scores on the anxiety scale are causally related to feelings of comfort in a social gathering. 
A)  The null hypothesis should be retained. 
B)  Scores on the anxiety scale are significantly related to feelings of comfort in a social gathering. 
C)  Scores on the anxiety scale are not significantly related to feelings of comfort in a social gathering. 
D)  Scores on the anxiety scale are causally related to feelings of comfort in a social gathering.

Question 13

Which expression represents the research hypothesis when testing for significance using the Pearson correlation coefficient?

Accepted Answer

A)  $\mu  $S1U1B11S1U1B0* $\mu  $S1U1B12S1U1B0 
B)  r $\neq  $ 0 
C)  $\rho  $*0 
D)  r *1 
A)  $\mu  $S1U1B11S1U1B0* $\mu  $S1U1B12S1U1B0 
B)  r $\neq  $ 0 
C)  $\rho  $*0 
D)  r *1

Question 14

If a positive relation exists between two variables, then high scores on one variable will be associated with _____ scores on the other variable.

Accepted Answer

A)  low 
B)  high 
C)  both high and low 
D)  neither high nor low 
A)  low 
B)  high 
C)  both high and low 
D)  neither high nor low

Question 15

A correlation coefficient higher than 0.05 is extremely unusual in behavioral science research.

Accepted Answer

A) True 
 B)False

Question 16

Which of these values of the correlation coefficient indicates the weakest relationship between two variables?

Accepted Answer

A)  -0.94 
B)  -0.62 
C)  0.68 
D)  0.95 
A)  -0.94 
B)  -0.62 
C)  0.68 
D)  0.95

Question 17

How are degrees of freedom calculated for the r distribution?

Accepted Answer

A)  N - 1 
B)  N - 2 
C)  N1 + N2 - 1 
D)  (SSX)(SSY) 
A)  N - 1 
B)  N - 2 
C)  N1 + N2 - 1 
D)  (SSX)(SSY)

Question 18

What is the relationship between correlation and causation?

Accepted Answer

A)  There is no relationship between correlation and causation. 
B)  Correlation is necessary for causation. 
C)  Correlation is sufficient for causation. 
D)  Correlation is both necessary and sufficient for causation. 
A)  There is no relationship between correlation and causation. 
B)  Correlation is necessary for causation. 
C)  Correlation is sufficient for causation. 
D)  Correlation is both necessary and sufficient for causation.

Question 19

_____ is a branch of statistics focused on developing accurate and unbiased tests and measurements.

Accepted Answer

A)  Descriptive statistics 
B)  Psychometrics 
C)  Correlations 
D)  Economics 
A)  Descriptive statistics 
B)  Psychometrics 
C)  Correlations 
D)  Economics

Question 20

Bart scored 86 on his statistics midterm, and the class average was 85.What would his deviation and z score be in a distribution of the midterm grades?

Accepted Answer

A)  It would be -1. 
B)  It would be 0. 
C)  It would be negative. 
D)  It would be positive. 
A)  It would be -1. 
B)  It would be 0. 
C)  It would be negative. 
D)  It would be positive.

When conducting a hypothesis test for the Pearson correlation coefficient, degrees of freedom is calculated by:

Which of these values indicates the strongest relationship between two variables?

When conducting a hypothesis test for the Pearson correlation coefficient, the null hypothesis states that there is _______ between the two variables.

Test-retest reliability is intended to measure a person's, not a test's, consistency over time.

The most widely used measure of reliability is:

A researcher examines the relationship between an individual's adjustment to becoming a parent and his or her age, while removing the influence of financial status.What procedure would allow such an analysis?

The correlation coefficient is how one measures the _____ of a correlation.

The correlation coefficient between the two variables, ear size and IQ score, is zero.What does this statement mean?

When performing a hypothesis test for correlation, one tests the null hypothesis that $\rho$ $\neq$ 0.0.

The denominator of the Pearson correlation equation corrects for _ and _ issues present in the numerator.

Based on research with her patients, Dr.Sabine knows that the correlation coefficient between scores on an anxiety scale and comfort at a social gathering is -0.35.If the critical value for r is 0.330, what should she conclude?

Which expression represents the research hypothesis when testing for significance using the Pearson correlation coefficient?

If a positive relation exists between two variables, then high scores on one variable will be associated with _____ scores on the other variable.

A correlation coefficient higher than 0.05 is extremely unusual in behavioral science research.

Which of these values of the correlation coefficient indicates the weakest relationship between two variables?

How are degrees of freedom calculated for the r distribution?

What is the relationship between correlation and causation?

_____ is a branch of statistics focused on developing accurate and unbiased tests and measurements.

Bart scored 86 on his statistics midterm, and the class average was 85.What would his deviation and z score be in a distribution of the midterm grades?

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Exam 15: Correlation

When conducting a hypothesis test for the Pearson correlation coefficient, degrees of freedom is calculated by:

Which of these values indicates the strongest relationship between two variables?

When conducting a hypothesis test for the Pearson correlation coefficient, the null hypothesis states that there is _______ between the two variables.

Test-retest reliability is intended to measure a person's, not a test's, consistency over time.

The most widely used measure of reliability is:

A researcher examines the relationship between an individual's adjustment to becoming a parent and his or her age, while removing the influence of financial status.What procedure would allow such an analysis?

The correlation coefficient is how one measures the _____ of a correlation.

The correlation coefficient between the two variables, ear size and IQ score, is zero.What does this statement mean?

When performing a hypothesis test for correlation, one tests the null hypothesis that ρ\rho ρ ≠\neq = 0.0.

The denominator of the Pearson correlation equation corrects for _____ and _____ issues present in the numerator.

Based on research with her patients, Dr.Sabine knows that the correlation coefficient between scores on an anxiety scale and comfort at a social gathering is -0.35.If the critical value for r is 0.330, what should she conclude?

Which expression represents the research hypothesis when testing for significance using the Pearson correlation coefficient?

If a positive relation exists between two variables, then high scores on one variable will be associated with _____ scores on the other variable.

A correlation coefficient higher than 0.05 is extremely unusual in behavioral science research.

Which of these values of the correlation coefficient indicates the weakest relationship between two variables?

How are degrees of freedom calculated for the r distribution?

What is the relationship between correlation and causation?

_____ is a branch of statistics focused on developing accurate and unbiased tests and measurements.

Bart scored 86 on his statistics midterm, and the class average was 85.What would his deviation and z score be in a distribution of the midterm grades?

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

When performing a hypothesis test for correlation, one tests the null hypothesis that $\rho$ $\neq$ 0.0.

The denominator of the Pearson correlation equation corrects for _ and _ issues present in the numerator.