In the following correlation matrix, skinfolds were taken at four sites in an attempt to estimate percent body fat (%fat). Which of the four skinfolds results in the LARGEST standard error of estimate for estimating %fat? \(\begin{array}{|l|c|c|c|c|c|} \hline & \text { \%fat } & \text { Chest } & \text { Abd } & \text { Calf } & \text { Back } \\ \hline \text { \%fat } & 1.00 & & & & \\ \hline \text { Chest } & .48 & 1.00 & & & \\ \hline \text { Abd } & .50 & .62 & 1.00 & & \\ \hline \text { Calf } & .58 & .26 & .11 & 1.00 & \\ \hline \text { Back } & .62 & .23 & .34 & .42 & 1.00 \\ \hline \end{array}\)

A) Chest B) Abd C) Calf D) Back E) It is impossible to determine from what is given. A) Chest B) Abd C) Calf D) Back E) It is impossible to determine from what is given.

What pattern of correlations would produce the best multiple regression equation? \(\begin{array}{|l|l|l|} \hline & \text { Criterion with Predictors } & \begin{array}{l} \text { Predictors with } \\ \text { Predictors } \end{array} \\ \hline \text { a. } & \text { Low } & \text { Low } \\ \hline \text { b. } & \text { Low } & \text { High } \\ \hline \text { c. } & \text { High } & \text { Low } \\ \hline \text { d. } & \text { High } & \text { High } \\ \hline \end{array}\)

The answer of What pattern of correlations would produce the...

Using the following data, what is the Pearson product-moment r between X and Y? \(\begin{array}{llllll} \text { Subject } & X & Y & X^{2} & Y^{2} & X Y \\ 1 & 8 & 7 & 64 & 49 & 56 \\ 2 & 9 & 10 & 81 & 100 & 90 \\ 3 & 3 & 5 & 9 & 25 & 15 \\ 4 & 4 & 5 & 16 & 25 & 20 \\ 5 & \underline{1} & \underline{3} & \underline{1} & \underline{9} & \underline{3} \\ \Sigma & 25 & 30 & 171 & 208 & 184 \end{array}\)

A) .75 B) .78 C) .95 D) .98 A) .75 B) .78 C) .95 D) .98

Exam 5: Correlation and Regression

In the following correlation matrix, skinfolds were taken at four sites in an attempt to estimate percent body fat (%fat). Which of the four skinfolds results in the LARGEST standard error of estimate for estimating %fat? \%fat Chest Abd Calf Back \%fat 1.00 Chest .48 1.00 Abd .50 .62 1.00 Calf .58 .26 .11 1.00 Back .62 .23 .34 .42 1.00

(Multiple Choice)

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Question 41

Refer to the boxes below, which represent variation in performance, to answer this question: In what type of discussion are these boxes used?

(Multiple Choice)

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Question 42

Mary is predicted to score 140 on an achievement test where the mean was 130 and the standard deviation was 10. How likely is it that her actual score will be at or below 134, if the correlation coefficient between the predictor and the achievement test is .80?

(Multiple Choice)

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Question 43

Which term LEAST belongs with the other three?

(Multiple Choice)

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Question 44

Most of the examinees who scored below the mean on Test 1 also scored below the mean on Test What kind of correlation would you expect between the two sets of test scores?

(Multiple Choice)

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Question 45

Which correlation method is used when both variables are measured on an ordinal level?

(Multiple Choice)

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Question 46

What pattern of correlations would produce the best multiple regression equation? Criterion with Predictors Predictors with Predictors a. Low Low b. Low High c. High Low d. High High

(Short Answer)

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Question 47

If the correlation coefficient between the length of marriage and marital happiness is +.82, what can we conclude?

(Multiple Choice)

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Question 48

What does a correlation coefficient of +.91 mean?

(Multiple Choice)

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Question 49

Using the following data, what is the Pearson product-moment r between X and Y? Subject X Y XY 1 8 7 64 49 56 2 9 10 81 100 90 3 3 5 9 25 15 4 4 5 16 25 20 5 \Sigma 25 30 171 208 184

(Multiple Choice)

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Question 50

You want to predict success on your second examination using information from your first examination score. The prediction equation is = 5X + 5, the mean on the first examination is 70, and the standard deviation of the second exam is 20. What is your predicted score on the second exam if you scored 20 on the first exam?

(Multiple Choice)

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Question 51

Refer to the boxes below, which represent variation in performance, to answer this question: In what type of discussion are these boxes used?

Mary is predicted to score 140 on an achievement test where the mean was 130 and the standard deviation was 10. How likely is it that her actual score will be at or below 134, if the correlation coefficient between the predictor and the achievement test is .80?

Which term LEAST belongs with the other three?

Most of the examinees who scored below the mean on Test 1 also scored below the mean on Test What kind of correlation would you expect between the two sets of test scores?

Which correlation method is used when both variables are measured on an ordinal level?

What pattern of correlations would produce the best multiple regression equation? Criterion with Predictors Predictors with Predictors a. Low Low b. Low High c. High Low d. High High

If the correlation coefficient between the length of marriage and marital happiness is +.82, what can we conclude?

What does a correlation coefficient of +.91 mean?

Using the following data, what is the Pearson product-moment r between X and Y? Subject X Y XY 1 8 7 64 49 56 2 9 10 81 100 90 3 3 5 9 25 15 4 4 5 16 25 20 5 \Sigma 25 30 171 208 184

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Introduction to Measurement and Statistics

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The Normal Curve and Standard Scores

Introduction to Inferential Statistics

Two-Sample T-Test

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Factorial Anova

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