Question 1

The extent to which two variables share common variance is estimated by.

Accepted Answer

A)  $r ^ { 2 }$ 
B)  $\sqrt { r }$ 
C)  $1 - r$ 
D)  $1 - r ^ { 2 }$ 
A)  $r ^ { 2 }$ 
B)  $\sqrt { r }$ 
C)  $1 - r$ 
D)  $1 - r ^ { 2 }$ A

Question 2

A Pearson r should be calculated only when the relationship between two variables can be assumed to be.

Accepted Answer

A) independent 
B) linear 
C) positive 
D) negative 
A) independent 
B) linear 
C) positive 
D) negative B

Question 3

If the results of a correlational study were reported as r(42) = +.26, p > .05, then you would know that H0 was and was.

Accepted Answer

A) ρ = 1; rejected 
B) ρ = 1; not rejected 
C) ρ = 0; rejected 
D) ρ = 0; not rejected 
A) ρ = 1; rejected 
B) ρ = 1; not rejected 
C) ρ = 0; rejected 
D) ρ = 0; not rejected D

Question 4

If the results of a correlational study were reported as r(14) = +.23, p > .05, then which of the following statements is true?

Accepted Answer

A) H0 was ρ = 0. 
B) H0 was not rejected. 
C) robs was +.23. 
D) All the above. 
A) H0 was ρ = 0. 
B) H0 was not rejected. 
C) robs was +.23. 
D) All the above.

Question 5

An assumption of the statistical test for the significance of r is that the.

Accepted Answer

A) variances of X and Y are equal 
B) means of the X and Y populations are equal 
C) X and Y scores form a bivariate normal distribution 
D) X and Y scores are statistically independent 
A) variances of X and Y are equal 
B) means of the X and Y populations are equal 
C) X and Y scores form a bivariate normal distribution 
D) X and Y scores are statistically independent

Question 6

If two variables are completely unrelated, robs.

Accepted Answer

A) equals zero 
B) equals either +1.00 or -1.00 
C) is a large value but not +1.00 or -1.00 
D) is greater than 1.00 
A) equals zero 
B) equals either +1.00 or -1.00 
C) is a large value but not +1.00 or -1.00 
D) is greater than 1.00

Question 7

The sign of r indicates the of the relationship between two variables.

Accepted Answer

A) strength 
B) direction 
C) magnitude 
D) degree 
A) strength 
B) direction 
C) magnitude 
D) degree

Question 8

In a test to determine if r is statistically significant, H0 is.

Accepted Answer

A) r = 0 
B) r = 1 
C) ρ ≠ 0 
D) ρ = 0 
A) r = 0 
B) r = 1 
C) ρ ≠ 0 
D) ρ = 0

Question 9

The Spearman r describes the relationship between pairs of scores that represent measurement.

Accepted Answer

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

Question 10

A scatterplot is a graph of a distribution.

Accepted Answer

A) one variable 
B) normal 
C) bimodal 
D) bivariate 
A) one variable 
B) normal 
C) bimodal 
D) bivariate

Question 11

The Pearson correlation coefficient is symbolized as.

Accepted Answer

A) R 
B) r 
C) P 
D) PC 
A) R 
B) r 
C) P 
D) PC

Question 12

The range of values that r can assume is.

Accepted Answer

A) 0.00 to +10.00 
B) 0.00 to -10.00 
C) -1.00 to +1.00 
D) none of the above 
A) 0.00 to +10.00 
B) 0.00 to -10.00 
C) -1.00 to +1.00 
D) none of the above

Question 13

An assumption of the statistical test for the significance of r is that.

Accepted Answer

A) the variances of X and Y are equal 
B) the means of the X and Y populations are equal 
C) the X and Y scores are statistically independent 
D) both the X and Y scores are normally distributed in the population sampled 
A) the variances of X and Y are equal 
B) the means of the X and Y populations are equal 
C) the X and Y scores are statistically independent 
D) both the X and Y scores are normally distributed in the population sampled

Question 14

If robs does not fall into a rejection region, then the decision is to H0 and H1.

Accepted Answer

A) accept; reject 
B) reject; accept 
C) fail to reject; not accept 
D) reject; not accept 
A) accept; reject 
B) reject; accept 
C) fail to reject; not accept 
D) reject; not accept

Question 15

A psychologist has found a correlation of +.54 between measures of need for achievement and college grade point average. Given this knowledge, you would expect that.

Accepted Answer

A) higher need for achievement scores are associated with higher college grade point averages 
B) higher need for achievement scores are associated with lower college grade point averages 
C) there is no relationship between need for achievement and college grade point average 
D) if you knew a student's need for achievement score, you could predict the student's grade point average perfectly 
A) higher need for achievement scores are associated with higher college grade point averages 
B) higher need for achievement scores are associated with lower college grade point averages 
C) there is no relationship between need for achievement and college grade point average 
D) if you knew a student's need for achievement score, you could predict the student's grade point average perfectly

Question 16

If two variables are related so that as values of one variable increase the values of the other also increase, then the relationship is said to be.

Accepted Answer

A) positive 
B) negative 
C) inverse 
D) indirect 
A) positive 
B) negative 
C) inverse 
D) indirect

Question 17

If the results of a study using the Spearman correlation coefficient were reported as rS(29) = -.24, p > .05, then which of the following statements is true?

Accepted Answer

A) H1 was accepted. 
B) The value of Npairs was 29. 
C) The X and Y variables are significantly negatively related. 
D) All the above. 
A) H1 was accepted. 
B) The value of Npairs was 29. 
C) The X and Y variables are significantly negatively related. 
D) All the above.

Question 18

If the results of a study using the Spearman correlation coefficient were reported as rS(17) = +.63, p < .05, then you would know that H0 was and was.

Accepted Answer

A) ρS = 1; rejected 
B) ρS = 1; not rejected 
C) ρS = 0; rejected 
D) ρS = 0; not rejected 
A) ρS = 1; rejected 
B) ρS = 1; not rejected 
C) ρS = 0; rejected 
D) ρS = 0; not rejected

Question 19

The Spearman correlation coefficient is symbolized by.

Accepted Answer

A) RS 
B) rS 
C) Spear r 
D) RSpearman 
A) RS 
B) rS 
C) Spear r 
D) RSpearman

Question 20

If the results of a study using the Spearman correlation coefficient were reported as rS(18) = +.57, p < .05, then which of the following statements is true?

Accepted Answer

A) H0 was ρS = 0. 
B) H0 was rejected. 
C) rS obs was +.57. 
D) All the above. 
A) H0 was ρS = 0. 
B) H0 was rejected. 
C) rS obs was +.57. 
D) All the above.

The extent to which two variables share common variance is estimated by.

A Pearson r should be calculated only when the relationship between two variables can be assumed to be.

If the results of a correlational study were reported as r(42) = +.26, p > .05, then you would know that H0 was and was.

If the results of a correlational study were reported as r(14) = +.23, p > .05, then which of the following statements is true?

An assumption of the statistical test for the significance of r is that the.

If two variables are completely unrelated, robs.

The sign of r indicates the of the relationship between two variables.

In a test to determine if r is statistically significant, H0 is.

The Spearman r describes the relationship between pairs of scores that represent measurement.

A scatterplot is a graph of a distribution.

The Pearson correlation coefficient is symbolized as.

The range of values that r can assume is.

An assumption of the statistical test for the significance of r is that.

If robs does not fall into a rejection region, then the decision is to H0 and H1.

A psychologist has found a correlation of +.54 between measures of need for achievement and college grade point average. Given this knowledge, you would expect that.

If two variables are related so that as values of one variable increase the values of the other also increase, then the relationship is said to be.

If the results of a study using the Spearman correlation coefficient were reported as rS(29) = -.24, p > .05, then which of the following statements is true?

If the results of a study using the Spearman correlation coefficient were reported as rS(17) = +.63, p < .05, then you would know that H0 was and was.

The Spearman correlation coefficient is symbolized by.

If the results of a study using the Spearman correlation coefficient were reported as rS(18) = +.57, p < .05, then which of the following statements is true?

Making Sense of Variability: an Introduction to Statistics

Statistics in the Context of Scientific Research

Looking at Data: Frequency Distributions and Graphs

Looking at Data: Measures of Central Tendency

Looking at Data: Measures of Variability

The Normal Distribution, Probability, and Standard Scores

Understanding Data: Using Statistics for Inference and Estimation

Is There Really a Difference Introduction to Statistical Hypothesis Testing

The Basics of Experimentation and Testing for a Difference Between Means

One-Factor Between-Subjects Analysis of Variance

Two-Factor Between-Subjects Analysis of Variance

One-Factor Within-Subjects Analysis of Variance

Regression Analysis: Predicting Linear Relationships

Nonparametric Tests

Filters

Exam 13: Correlation: Understanding Covariation

The extent to which two variables share common variance is estimated by.

A Pearson r should be calculated only when the relationship between two variables can be assumed to be.

If the results of a correlational study were reported as r(42) = +.26, p > .05, then you would know that H0 was and was.

If the results of a correlational study were reported as r(14) = +.23, p > .05, then which of the following statements is true?

An assumption of the statistical test for the significance of r is that the.

If two variables are completely unrelated, robs.

The sign of r indicates the of the relationship between two variables.

In a test to determine if r is statistically significant, H0 is.

The Spearman r describes the relationship between pairs of scores that represent measurement.

A scatterplot is a graph of a distribution.

The Pearson correlation coefficient is symbolized as.

The range of values that r can assume is.

An assumption of the statistical test for the significance of r is that.

If robs does not fall into a rejection region, then the decision is to H0 and H1.

A psychologist has found a correlation of +.54 between measures of need for achievement and college grade point average. Given this knowledge, you would expect that.

If two variables are related so that as values of one variable increase the values of the other also increase, then the relationship is said to be.

If the results of a study using the Spearman correlation coefficient were reported as rS(29) = -.24, p > .05, then which of the following statements is true?

If the results of a study using the Spearman correlation coefficient were reported as rS(17) = +.63, p < .05, then you would know that H0 was and was.

The Spearman correlation coefficient is symbolized by.

If the results of a study using the Spearman correlation coefficient were reported as rS(18) = +.57, p < .05, then which of the following statements is true?

Making Sense of Variability: an Introduction to Statistics

Statistics in the Context of Scientific Research

Looking at Data: Frequency Distributions and Graphs

Looking at Data: Measures of Central Tendency

Looking at Data: Measures of Variability

The Normal Distribution, Probability, and Standard Scores

Understanding Data: Using Statistics for Inference and Estimation

Is There Really a Difference Introduction to Statistical Hypothesis Testing

The Basics of Experimentation and Testing for a Difference Between Means

One-Factor Between-Subjects Analysis of Variance

Two-Factor Between-Subjects Analysis of Variance

One-Factor Within-Subjects Analysis of Variance

Regression Analysis: Predicting Linear Relationships

Nonparametric Tests

Filters