Question 1

Assuming that SSY is constant,which of the following correlations would have the largest SSresidual?

Accepted Answer

A) r = -0.10 
B) r = +0.40 
C) r = -0.70 
D) There is no relationship between the correlation and SSresidual. 
A) r = -0.10 
B) r = +0.40 
C) r = -0.70 
D) There is no relationship between the correlation and SSresidual.

Question 2

What is indicated by a Pearson correlation of r = +1.00 between X and Y?

Accepted Answer

A) Each time X increases,there is a perfectly predictable increase in Y 
B) Every change in X causes a change in Y 
C) Every increase in X causes an increase in Y 
D) All of the other 3 choices occur with a correlation of +1.00. 
A) Each time X increases,there is a perfectly predictable increase in Y 
B) Every change in X causes a change in Y 
C) Every increase in X causes an increase in Y 
D) All of the other 3 choices occur with a correlation of +1.00.

Question 3

For a two-tailed hypothesis test evaluating the significance of a correlation,the null hypothesis states that the sample correlation is zero.

Accepted Answer

A) True 
 B)False

Question 4

A set of X and Y scores has MX = 4,MY = 10,SSX = 10,and SP = 5.The regression equation for these scores is Y = 0.5X  8.

Accepted Answer

A) True 
 B)False

Question 5

A set of n = 5 pairs of X and Y values has SSX = 16,SSY = 4 and SP = 2.For these data,what is the Pearson correlation ?

Accepted Answer

A) r = 2/64 
B) r = 2/8 
C) r = F1F1F1S1F1F1F102/8 
D) r = 64/64 
A) r = 2/64 
B) r = 2/8 
C) r = F1F1F1S1F1F1F102/8 
D) r = 64/64

Question 6

If other factors are held constant,if the Pearson correlation between X and Y is r = 0.80,then the regression equation will produce more accurate predictions than would be obtained if r = 0.60.

Accepted Answer

A) True 
 B)False

Question 7

A set of X and Y scores has a Pearson correlation of r = 0.60.For these data,60% of the variability in the Y scores can be predicted from the relationship with X.

Accepted Answer

A) True 
 B)False

Question 8

A sample of n = 25 pairs of scores (X and Y values)produces a correlation of r = -0.40.Are these sample data sufficient to conclude that there is a significant non-zero correlation between X and Y in the population? Use a two-tailed test at the .05 level of significance.

Accepted Answer

The standard error =

Question 9

For which of the following Pearson correlations would the data points be clustered most closely around a straight line?

Accepted Answer

A) r = -0.10 
B) r = +0.40 
C) r = -0.70 
D) There is no relationship between the correlation and how close the points are to a straight line. 
A) r = -0.10 
B) r = +0.40 
C) r = -0.70 
D) There is no relationship between the correlation and how close the points are to a straight line.

Question 10

A linear regression equation has b = 3 and a = - 6.What is the predicted value of Y for X = 4?

Accepted Answer

A)    
B)    
C)    
D) Cannot be determined without additional information 
A)    
B)    
C)    
D) Cannot be determined without additional information

Question 11

The Pearson and the Spearman correlations are both computed for the same set of data.If the Spearman correlation is rS = +1.00,what can you conclude about the Pearson correlation?

Accepted Answer

A) It will be positive 
B) It will have a value of 1.00 
C) It will be positive and have a value of 1.00 
D) There is no predictable relationship between the Pearson and the Spearman correlations. 
A) It will be positive 
B) It will have a value of 1.00 
C) It will be positive and have a value of 1.00 
D) There is no predictable relationship between the Pearson and the Spearman correlations.

Question 12

For the linear equation Y = 2X + 4,if X increases by 1 point,how much will Y increase?

Accepted Answer

A) 1 points 
B) 2 points 
C) 3 points 
D) 4 points 
A) 1 points 
B) 2 points 
C) 3 points 
D) 4 points

Question 13

A set of n = 5 pairs of X and Y scores has ΣX = 15,ΣY = 5,and ΣXY = 10.For these data,what is the value of SP?

Accepted Answer

A) -5 
B) 5 
C) 10 
D) 25 
A) -5 
B) 5 
C) 10 
D) 25

Question 14

A researcher obtains a Pearson correlation of r = 0.60 for a sample of n = 6 pairs of X and Y scores.If the researcher tests the significance of the correlation,what value will be obtained for the t statistic?

Accepted Answer

A) 0.6/0.16 = 3.75 
B) 0.6/0.4 = 1.50 
C) 0/6/0.8 = 0.77 
D) 0.6/1.0 = 0.6 
A) 0.6/0.16 = 3.75 
B) 0.6/0.4 = 1.50 
C) 0/6/0.8 = 0.77 
D) 0.6/1.0 = 0.6

Question 15

If the following nine scores are ranked from smallest (#1)to largest,what rank should be assigned to a score of X = 1? Scores: 1,1,1,1,3,6,6,6,9

Accepted Answer

A) 1 
B) 2 
C) 2.5 
D) 4 
A) 1 
B) 2 
C) 2.5 
D) 4

Question 16

A set of n = 15 pairs of X and Y scores has SSX = 10,SSY = 40,and SP = 30.What is the slope for the regression equation for predicting Y from X?

Accepted Answer

A) 10/30 
B) 10/40 
C) 40/10 
D) 30/10 
A) 10/30 
B) 10/40 
C) 40/10 
D) 30/10

Question 17

A set of X and Y scores has MX = 4,SSX = 10,MY = 5,SSY = 40,and SP = 20.What is the regression equation for predicting Y from X?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 18

One or two extreme data points can have a dramatic effect on the size of a correlation.

Accepted Answer

A) True 
 B)False

Question 19

A researcher finds a significant correlation between the amount of time spent watching television and blood pressure for a sample of 40-year-old men.This means that watching more television causes high blood pressure.

Accepted Answer

A) True 
 B)False

Question 20

The F-ratio evaluating the significance of a linear regression equation based on n = 10 pairs of X and Y scores has df = 1,9.

Accepted Answer

A) True 
 B)False

Assuming that SS_Y is constant,which of the following correlations would have the largest SS_residual?

What is indicated by a Pearson correlation of r = +1.00 between X and Y?

For a two-tailed hypothesis test evaluating the significance of a correlation,the null hypothesis states that the sample correlation is zero.

A set of X and Y scores has M_X = 4,M_Y = 10,SS_X = 10,and SP = 5.The regression equation for these scores is Y = 0.5X  8.

A set of n = 5 pairs of X and Y values has SS_X = 16,SS_Y = 4 and SP = 2.For these data,what is the Pearson correlation ?

If other factors are held constant,if the Pearson correlation between X and Y is r = 0.80,then the regression equation will produce more accurate predictions than would be obtained if r = 0.60.

A set of X and Y scores has a Pearson correlation of r = 0.60.For these data,60% of the variability in the Y scores can be predicted from the relationship with X.

A sample of n = 25 pairs of scores (X and Y values)produces a correlation of r = -0.40.Are these sample data sufficient to conclude that there is a significant non-zero correlation between X and Y in the population? Use a two-tailed test at the .05 level of significance.

For which of the following Pearson correlations would the data points be clustered most closely around a straight line?

A linear regression equation has b = 3 and a = - 6.What is the predicted value of Y for X = 4?

The Pearson and the Spearman correlations are both computed for the same set of data.If the Spearman correlation is r_S = +1.00,what can you conclude about the Pearson correlation?

For the linear equation Y = 2X + 4,if X increases by 1 point,how much will Y increase?

A set of n = 5 pairs of X and Y scores has ΣX = 15,ΣY = 5,and ΣXY = 10.For these data,what is the value of SP?

A researcher obtains a Pearson correlation of r = 0.60 for a sample of n = 6 pairs of X and Y scores.If the researcher tests the significance of the correlation,what value will be obtained for the t statistic?

If the following nine scores are ranked from smallest (#1)to largest,what rank should be assigned to a score of X = 1? Scores: 1,1,1,1,3,6,6,6,9

A set of n = 15 pairs of X and Y scores has SS_X = 10,SS_Y = 40,and SP = 30.What is the slope for the regression equation for predicting Y from X?

A set of X and Y scores has M_X = 4,SS_X = 10,M_Y = 5,SS_Y = 40,and SP = 20.What is the regression equation for predicting Y from X?

One or two extreme data points can have a dramatic effect on the size of a correlation.

A researcher finds a significant correlation between the amount of time spent watching television and blood pressure for a sample of 40-year-old men.This means that watching more television causes high blood pressure.

The F-ratio evaluating the significance of a linear regression equation based on n = 10 pairs of X and Y scores has df = 1,9.

Introduction to Statistics

Frequency Distributions

Measures of Central Tendency

Measures of Variability

Z-Scores

Probability

Probability and Samples:

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Anova

Chi-Square Tests

Filters

Exam 14: Correlation and Regression

Assuming that SSY is constant,which of the following correlations would have the largest SSresidual?

What is indicated by a Pearson correlation of r = +1.00 between X and Y?

For a two-tailed hypothesis test evaluating the significance of a correlation,the null hypothesis states that the sample correlation is zero.

A set of X and Y scores has MX = 4,MY = 10,SSX = 10,and SP = 5.The regression equation for these scores is Y = 0.5X  8.

A set of n = 5 pairs of X and Y values has SSX = 16,SSY = 4 and SP = 2.For these data,what is the Pearson correlation ?

If other factors are held constant,if the Pearson correlation between X and Y is r = 0.80,then the regression equation will produce more accurate predictions than would be obtained if r = 0.60.

A set of X and Y scores has a Pearson correlation of r = 0.60.For these data,60% of the variability in the Y scores can be predicted from the relationship with X.

A sample of n = 25 pairs of scores (X and Y values)produces a correlation of r = -0.40.Are these sample data sufficient to conclude that there is a significant non-zero correlation between X and Y in the population? Use a two-tailed test at the .05 level of significance.

For which of the following Pearson correlations would the data points be clustered most closely around a straight line?

A linear regression equation has b = 3 and a = - 6.What is the predicted value of Y for X = 4?

The Pearson and the Spearman correlations are both computed for the same set of data.If the Spearman correlation is rS = +1.00,what can you conclude about the Pearson correlation?

For the linear equation Y = 2X + 4,if X increases by 1 point,how much will Y increase?

A set of n = 5 pairs of X and Y scores has ΣX = 15,ΣY = 5,and ΣXY = 10.For these data,what is the value of SP?

A researcher obtains a Pearson correlation of r = 0.60 for a sample of n = 6 pairs of X and Y scores.If the researcher tests the significance of the correlation,what value will be obtained for the t statistic?

If the following nine scores are ranked from smallest (#1)to largest,what rank should be assigned to a score of X = 1? Scores: 1,1,1,1,3,6,6,6,9

A set of n = 15 pairs of X and Y scores has SSX = 10,SSY = 40,and SP = 30.What is the slope for the regression equation for predicting Y from X?

A set of X and Y scores has MX = 4,SSX = 10,MY = 5,SSY = 40,and SP = 20.What is the regression equation for predicting Y from X?

One or two extreme data points can have a dramatic effect on the size of a correlation.

A researcher finds a significant correlation between the amount of time spent watching television and blood pressure for a sample of 40-year-old men.This means that watching more television causes high blood pressure.

The F-ratio evaluating the significance of a linear regression equation based on n = 10 pairs of X and Y scores has df = 1,9.

Introduction to Statistics

Frequency Distributions

Measures of Central Tendency

Measures of Variability

Z-Scores

Probability

Probability and Samples:

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures and Two-Factor Anova

Chi-Square Tests

Filters

Assuming that SS_Y is constant,which of the following correlations would have the largest SS_residual?

A set of X and Y scores has M_X = 4,M_Y = 10,SS_X = 10,and SP = 5.The regression equation for these scores is Y = 0.5X  8.

A set of n = 5 pairs of X and Y values has SS_X = 16,SS_Y = 4 and SP = 2.For these data,what is the Pearson correlation ?

The Pearson and the Spearman correlations are both computed for the same set of data.If the Spearman correlation is r_S = +1.00,what can you conclude about the Pearson correlation?

A set of n = 15 pairs of X and Y scores has SS_X = 10,SS_Y = 40,and SP = 30.What is the slope for the regression equation for predicting Y from X?

A set of X and Y scores has M_X = 4,SS_X = 10,M_Y = 5,SS_Y = 40,and SP = 20.What is the regression equation for predicting Y from X?