The following X and Y scores produce SS? = 2 and SP = 8.What is regression equation for predicting Y? \[\begin{array} { l l } \mathrm { X } & \mathrm { Y } \\ \hline 1 & 2 \\ 2 & 3 \\ 3 & 10 \end{array}\]

A) Y = 0.25X + 4.5 B) Y = 0.25X - 4.5 C) Y = 4X + 3 D) Y = 4X - 3 A) Y = 0.25X + 4.5 B) Y = 0.25X - 4.5 C) Y = 4X + 3 D) Y = 4X - 3

Which of the following best describes the Pearson correlation for these data? \[\begin{array} { l l } \mathrm { X } & \mathrm { Y } \\ \hline 2 & 5 \\ 5 & 1 \\ 3 & 4 \\ 4 & 2 \end{array}\]

A) Positive B) Negative C) Zero D) Cannot be determined A) Positive B) Negative C) Zero D) Cannot be determined

Exam 14: Correlation and Regression.

If people are classified by age (over 30/under 30)and by political affiliation (Democrat/Republican),then the point-biserial correlation would be the proper technique to measure the relationship between the two variables.

(True/False)

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Question 41

Compute the Pearson correlation for the following data.

(Short Answer)

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Question 42

It is possible for none of the actual (observed)data points to be located on the regression line described by the regression equation.

(True/False)

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Question 43

A negative correlation means that decreases in the X variable tend to be accompanied by decreases in the Y variable.

(True/False)

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Question 44

For the regression equation Y = 2X - 3,if the mean for X is MX = 5,what is the mean for Y?

(Multiple Choice)

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Question 45

A set of n = 15 pairs of scores (X and Y values)has SSₓ = 4,SSʏ = 25,and SP = 6.What is the Pearson correlation for these data?

(Multiple Choice)

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Question 46

The following X and Y scores produce SS? = 2 and SP = 8.What is regression equation for predicting Y? 1 2 2 3 3 10

(Multiple Choice)

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Question 47

What correlation is obtained when the Pearson correlation is computed for data that have been converted to ranks?

(Multiple Choice)

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Question 48

If there is a positive correlation between X and Y,then the regression equation Y = bX + a will have _____.

(Multiple Choice)

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Question 49

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?

(Multiple Choice)

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Question 50

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.

(True/False)

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Question 51

Which of the following best describes the Pearson correlation for these data? 2 5 5 1 3 4 4 2

(Multiple Choice)

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Question 52

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

(Multiple Choice)

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Question 53

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

(Multiple Choice)

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Question 54

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

(Multiple Choice)

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Question 55

The scatter plot for a set of X and Y values shows the data points clustered in a nearly perfect circle.For these data,what is the most likely value for the Pearson correlation?

(Multiple Choice)

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Question 56

If other factors are held constant and 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.

(True/False)

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Question 57

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

(Multiple Choice)

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Question 58

Assuming that other factors are constant,a correlation of r = -0.95 will result in more accurate predictions than a correlation of r = +0.70.

(True/False)

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Question 59

Suppose that there is a correlation of r = 0.41 between the amount of time that each student reports studying for an exam and the student's grade on the exam.This correlation would mean that there is a tendency for people who study more to get better grades.

(True/False)

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Question 60

Showing 41 - 60 of 85

If people are classified by age (over 30/under 30)and by political affiliation (Democrat/Republican),then the point-biserial correlation would be the proper technique to measure the relationship between the two variables.

Compute the Pearson correlation for the following data.

It is possible for none of the actual (observed)data points to be located on the regression line described by the regression equation.

A negative correlation means that decreases in the X variable tend to be accompanied by decreases in the Y variable.

For the regression equation Y = 2X - 3,if the mean for X is MX = 5,what is the mean for Y?

A set of n = 15 pairs of scores (X and Y values)has SSₓ = 4,SSʏ = 25,and SP = 6.What is the Pearson correlation for these data?

The following X and Y scores produce SS? = 2 and SP = 8.What is regression equation for predicting Y? 1 2 2 3 3 10

What correlation is obtained when the Pearson correlation is computed for data that have been converted to ranks?

If there is a positive correlation between X and Y,then the regression equation Y = bX + a will have _____.

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 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.

Which of the following best describes the Pearson correlation for these data? 2 5 5 1 3 4 4 2

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

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

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

The scatter plot for a set of X and Y values shows the data points clustered in a nearly perfect circle.For these data,what is the most likely value for the Pearson correlation?

If other factors are held constant and 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.

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

Assuming that other factors are constant,a correlation of r = -0.95 will result in more accurate predictions than a correlation of r = +0.70.

Suppose that there is a correlation of r = 0.41 between the amount of time that each student reports studying for an exam and the student's grade on the exam.This correlation would mean that there is a tendency for people who study more to get better grades.

Introduction to Statistics.

Frequency Distributions.

Central Tendency.

Variability.

z-Scores: Location of Scores and Standardized Distributions.

Probability.

Probability and Samples: The Distribution of Sample Means.

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 Analysis of Variance

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

Filters

Exam 14: Correlation and Regression.

If people are classified by age (over 30/under 30)and by political affiliation (Democrat/Republican),then the point-biserial correlation would be the proper technique to measure the relationship between the two variables.

Compute the Pearson correlation for the following data.

It is possible for none of the actual (observed)data points to be located on the regression line described by the regression equation.

A negative correlation means that decreases in the X variable tend to be accompanied by decreases in the Y variable.

For the regression equation Y = 2X - 3,if the mean for X is MX = 5,what is the mean for Y?

A set of n = 15 pairs of scores (X and Y values)has SSₓ = 4,SSʏ = 25,and SP = 6.What is the Pearson correlation for these data?

The following X and Y scores produce SS? = 2 and SP = 8.What is regression equation for predicting Y? 1 2 2 3 3 10

What correlation is obtained when the Pearson correlation is computed for data that have been converted to ranks?

If there is a positive correlation between X and Y,then the regression equation Y = bX + a will have _____.

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?

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.

Which of the following best describes the Pearson correlation for these data? 2 5 5 1 3 4 4 2

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

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

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

The scatter plot for a set of X and Y values shows the data points clustered in a nearly perfect circle.For these data,what is the most likely value for the Pearson correlation?

If other factors are held constant and 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.

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

Assuming that other factors are constant,a correlation of r = -0.95 will result in more accurate predictions than a correlation of r = +0.70.

Suppose that there is a correlation of r = 0.41 between the amount of time that each student reports studying for an exam and the student's grade on the exam.This correlation would mean that there is a tendency for people who study more to get better grades.

Introduction to Statistics.

Frequency Distributions.

Central Tendency.

Variability.

z-Scores: Location of Scores and Standardized Distributions.

Probability.

Probability and Samples: The Distribution of Sample Means.

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 Analysis of Variance

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

Filters

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?