Data Set 6-2 The correlation between a score based on anthropometric measurements (height, strength, reaction time and others) and college GPA is .05. Your task will be to predict GPA, given the anthro measurements. Be sure you set this up properly and work precisely. (Use 3 or 4 decimal places.) \[\begin{array} { l r c } & \underline{\text { GPA }} & \underline{ \text { Anthro Scores} } \\ \text { Mean } & 2.5 & 10 \\ \text { Standard Deviation } &0.5 & 2 \end{array}\] -See Data Set 6-2. Suppose an excellent statistician used linear regression to predict the GPA for a person whose anthropometric score was 15. How likely is it that such a person would actually get the GPA predicted for her?

A) very B) moderately C) hardly. A) very B) moderately C) hardly.

Data Set 6-8 \[\begin{array} { l l } X & Y \\ \hline 1 & 4 \\ 2 & 3 \\ 2 & 2 \end{array}\] -The correlation coefficient in Data Set 6-8 is

A) positive B) negative C) zero D) none of the other alternatives are correct. A) positive B) negative C) zero D) none of the other alternatives are correct.

Data Set 6-7 \[\begin{array} { l l } X & Y \\ \hline 1 & 4 \\ 2 & 5 \\ 4 & 6 \end{array}\] -In Data Set 6-7, the Pearson correlation coefficient is

A) 1.00 B) 0.98 C) 0.68 A) 1.00 B) 0.98 C) 0.68

Given the data below, compute r using the z-score method. \[\begin{array} { l l } X & Y \\ \hline 1 & 2 \\ 2 & 4 \\ 3 & 6 \end{array}\]

\[\begin{array} { c c c c c } \bar { X

Exam 6: Correlation and Regression

Data Set 6-2 The correlation between a score based on anthropometric measurements (height, strength, reaction time and others) and college GPA is .05. Your task will be to predict GPA, given the anthro measurements. Be sure you set this up properly and work precisely. (Use 3 or 4 decimal places.) Mean 2.5 10 Standard Deviation 0.5 2 -Based on Data Set 6-2, predict a GPA for a person whose anthro data score was 15.

(Multiple Choice)

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Question 141

Correlation coefficients range from -1.00 to 1.00.

(True/False)

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Question 142

The least squares method of finding a formula for a straight line

(Multiple Choice)

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Question 143

Data Set 6-2 The correlation between a score based on anthropometric measurements (height, strength, reaction time and others) and college GPA is .05. Your task will be to predict GPA, given the anthro measurements. Be sure you set this up properly and work precisely. (Use 3 or 4 decimal places.) Mean 2.5 10 Standard Deviation 0.5 2 -See Data Set 6-2. Suppose an excellent statistician used linear regression to predict the GPA for a person whose anthropometric score was 15. How likely is it that such a person would actually get the GPA predicted for her?

(Multiple Choice)

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Question 144

Data Set 6-10: The correlation between a score based on anthropometric measurements (height, strength, reaction time and others) and college GPA is .05. Your task will be to predict GPA, given the anthro measurements. Be sure you set this up properly and work precisely (3 or 4 decimal places.). Mean 2.6 20 Standard Deviation 0.7 4 -Based on the correlation coefficient in Data Set 6-10, the amount of confidence you should place in a prediction about GPA is

(Multiple Choice)

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Question 145

Data Set 6-8 X Y 1 4 2 3 2 2 -The correlation coefficient in Data Set 6-8 is

(Multiple Choice)

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Question 146

Which of the following is (are) possible?

(Multiple Choice)

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Question 147

For the data below, calculate r and write a sentence or two of explanation. Average Salary Average Liquor 1910 150 7 1915 150 9 1920 175 11 1925 200 15 1930 175 12 1935 150 9 1940 200 16

(Essay)

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Question 148

The coefficient of determination is the square root of r.

(True/False)

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Question 149

To use the regression equation technique described in your text, you must have

(Multiple Choice)

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Question 150

Data Set 6-10: The correlation between a score based on anthropometric measurements (height, strength, reaction time and others) and college GPA is .05. Your task will be to predict GPA, given the anthro measurements. Be sure you set this up properly and work precisely (3 or 4 decimal places.). Mean 2.6 20 Standard Deviation 0.7 4 -The b coefficient in Data Set 6-10 is

(Multiple Choice)

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Question 151

The kind of data required for a Pearson product-moment correlation is

(Multiple Choice)

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Question 152

A linear relationship is described by which of the statements below?

(Multiple Choice)

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Question 153

Is there a relationship between a student's grade and that same student's evaluation of the course? Here are some data that might be expected based on many studies. (A = 4, B = 3, C = 2, D = 1, F = 0). 1 4 7 2 1 3 3 3 1 4 0 6 5 2 6 6 2 2 7 3 6 a. Draw a scatterplot and calculate r. b. Write an interpretation.

(Essay)

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Question 154

The regression coefficient, a, is most clearly related to

(Multiple Choice)

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Question 155

A scatterplot is a graph of a bivariate distribution.

(True/False)

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Question 156

Data Set 6-7 X Y 1 4 2 5 4 6 -In Data Set 6-7, the Pearson correlation coefficient is

(Multiple Choice)

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Question 157

Given the data below, compute r using the z-score method. X Y 1 2 2 4 3 6

(Essay)

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Question 158

The philosophy that a phenomenon can be better understood if its essential parts are expressed as numbers is called

(Multiple Choice)

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Question 159

You will be most confident in the accuracy of your predicted value of Y when

(Multiple Choice)

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Question 160

Correlation coefficients range from -1.00 to 1.00.

The least squares method of finding a formula for a straight line

Data Set 6-8 X Y 1 4 2 3 2 2 -The correlation coefficient in Data Set 6-8 is

Which of the following is (are) possible?

For the data below, calculate r and write a sentence or two of explanation. Average Salary Average Liquor 1910 150 7 1915 150 9 1920 175 11 1925 200 15 1930 175 12 1935 150 9 1940 200 16

The coefficient of determination is the square root of r.

To use the regression equation technique described in your text, you must have

The kind of data required for a Pearson product-moment correlation is

A linear relationship is described by which of the statements below?

The regression coefficient, a, is most clearly related to

A scatterplot is a graph of a bivariate distribution.

Data Set 6-7 X Y 1 4 2 5 4 6 -In Data Set 6-7, the Pearson correlation coefficient is

Given the data below, compute r using the z-score method. X Y 1 2 2 4 3 6

The philosophy that a phenomenon can be better understood if its essential parts are expressed as numbers is called

You will be most confident in the accuracy of your predicted value of Y when

Introduction

Exploring Data: Frequency Distributions and Graphs

Exploring Data: Central Tendency

Exploring Data: Variability

Other Descriptive Statistics

Theoretical Distributions Including the Normal Distribution

Samples, Sampling Distributions, and Confidence Intervals

Hypothesis Testing and Effect Size: One-Sample Designs

Hypothesis Testing, Effect Size, and and Confidence Intervals: Two-Sample Designs

Analysis of Variance: One-Way Classification

Analysis of Variance: One-Factor Repeated Measures

Analysis of Variance: Factorial Design

Chi Square Tests

More Nonparametric Tests

Appendix: Grouped Frequency Distributions and Central Tendency

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