A) a degree of association between two variables signifies a causal relationship between them. B) a causal relationship between two variables results in a degree of association between them. C) both (a) and (b) are true D) neither (a) nor (b) are true A) a degree of association between two variables signifies a causal relationship between them. B) a causal relationship between two variables results in a degree of association between them. C) both (a) and (b) are true D) neither (a) nor (b) are true

Exam 7: Correlation

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The r between job aptitude scores and job success ratings is computed to be +.29. Which of the following is the best guess as to the value for r had all, rather than just the best qualified applicants been hired?

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Question 1

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If Pearson r is calculated for data that are curvilinearly related, it will

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Question 2

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It is common to find that the correlation between airplane pilot aptitude test score and pilot proficiency is higher among aviation cadets than among experienced pilots. What could account for this?

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Question 3

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The experienced pilots constitute a more restricted group on proficiency because of their experience and previous dropout of the less able.

The z score and deviation score formulas for r are useful for

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Question 4

The problem of range of talent suggests that when reporting a correlation coefficient, it is also important to report

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Question 5

Fundamentally,

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Question 6

-Calculate Spearman's for the data in Problem 1.

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Question 7

A group of highly creative men and women are studied to determine the degree of relationship between creative ratings and IQ scores. For this group, we would expect the correlation to be

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Question 8

In a given group, the correlation between height measured in feet and weight measured in pounds is +.68. Which of the following would alter the value of r?

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Question 9

Which value of r indicates the strongest degree of relationship?

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Question 10

In the "world of real data," we are least likely to find values of r that are

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Question 11

In a scatter diagram, if one of the points does not fall on the straight line of best fit to all the points, r cannot be

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Question 12

Which of the following explains why poor grades and poor attendance often go together?

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Question 13

Random sampling variation among values of r is greatest when

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Question 14

Fifty students have taken a 100-item true-false test. For each student, let X be the number of questions answered correctly and Y be the number not answered correctly. We would expect r to be

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Question 15

Two supervisors independently rate the performance of the same seven checkout clerks in a supermarket. Compute r.

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Question 16

The value of r is computed from raw scores. Which is likely to change the value of r?

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Question 17

To learn how well we can predict Y from knowledge of X, we calculate r and find From this, we know that

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Question 18

In a scatter diagram, if the cluster of data points slopes from lower left to upper right, this indicates

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Question 19

Which value of r indicates the least amount of relationship?

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Question 20

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Exam 7: Correlation

The r between job aptitude scores and job success ratings is computed to be +.29. Which of the following is the best guess as to the value for r had all, rather than just the best qualified applicants been hired?

If Pearson r is calculated for data that are curvilinearly related, it will

It is common to find that the correlation between airplane pilot aptitude test score and pilot proficiency is higher among aviation cadets than among experienced pilots. What could account for this?

The z score and deviation score formulas for r are useful for

The problem of range of talent suggests that when reporting a correlation coefficient, it is also important to report

Fundamentally,

-Calculate Spearman's for the data in Problem 1.

A group of highly creative men and women are studied to determine the degree of relationship between creative ratings and IQ scores. For this group, we would expect the correlation to be

In a given group, the correlation between height measured in feet and weight measured in pounds is +.68. Which of the following would alter the value of r?

Which value of r indicates the strongest degree of relationship?

In the "world of real data," we are least likely to find values of r that are

In a scatter diagram, if one of the points does not fall on the straight line of best fit to all the points, r cannot be

Which of the following explains why poor grades and poor attendance often go together?

Random sampling variation among values of r is greatest when

Fifty students have taken a 100-item true-false test. For each student, let X be the number of questions answered correctly and Y be the number not answered correctly. We would expect r to be

Two supervisors independently rate the performance of the same seven checkout clerks in a supermarket. Compute r.

The value of r is computed from raw scores. Which is likely to change the value of r?

To learn how well we can predict Y from knowledge of X, we calculate r and find From this, we know that

In a scatter diagram, if the cluster of data points slopes from lower left to upper right, this indicates

Which value of r indicates the least amount of relationship?

Introduction

Frequency Distributions, Percentiles,

Graphic Representation of Frequency Distributions

Central Tendency

Variability and Standard Z Scores

Standard Scores and the Normal Curve

Prediction

Interpretive Aspects of Correlation and Regression

Probability

Random Sampling and Sampling Distributions

Introduction to Statistical Inference: Testing Hypotheses About Single Means Z and T

Interpreting the Results of Hypothesis Testing: Effect Size, Type I and Type II Errors, and Power

Testing Hypotheses About the Difference Between Two Independent Groups

Testing for a Difference

Inference About Correlation Coefficients

An Alternative to Hypothesis Testing: Confidence Intervals

Testing for Differences Among Three or More Groups: One-Way Analysis of Variance and Some Alternatives

Factorial Analysis of Variance

Chi-Square and Inference About Frequencies

Some Almost Assumption-Free Tests

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