Question 1

What kind of relationship is depicted in the following graph?

Accepted Answer

A) A positive linear correlation 
B) A negative linear correlation 
C) No correlation 
D) A nonlinear correlation 
A) A positive linear correlation 
B) A negative linear correlation 
C) No correlation 
D) A nonlinear correlation

Question 2

Calculate the appropriate correlation coefficient for the following data.

Accepted Answer

A) F1F1F1S1F1F1F100.07 
B) +0.95 
C) +0.49 
D) +0.23 
A) F1F1F1S1F1F1F100.07 
B) +0.95 
C) +0.49 
D) +0.23

Question 3

Calculate the appropriate correlation coefficient for the following data.

Accepted Answer

A) -0.97 
B) -0.39 
C) +0.11 
D) +0.57 
A) -0.97 
B) -0.39 
C) +0.11 
D) +0.57

Question 4

In a study about the relationship between their age and women's attitudes about marriage,you survey over 500 undergraduate women and calculate a Pearson correlation coefficient.What mistake have you made?

Accepted Answer

A) You have collected too much data. 
B) There is no way a woman's attitude about marriage can affect her age. 
C) You only surveyed young women in college causing a restriction of range. 
D) You have used the wrong correlation coefficient the type of data. 
A) You have collected too much data. 
B) There is no way a woman's attitude about marriage can affect her age. 
C) You only surveyed young women in college causing a restriction of range. 
D) You have used the wrong correlation coefficient the type of data.

Question 5

Professor Miller has found that the correlation between a person's "need for affiliation" (found by taking a test to determine the need to be with others)and the number of hours spent watching television is F1F1F1S1F1F1F100.69.He should conclude that

Accepted Answer

A) as we observe people with higher and higher need for affiliation,we see a tendency for those people to spend less and less time watching television. 
B) there is not much of a relationship between the two variables because the r is negative. 
C) as we observe people with higher and higher need for affiliation,we see a tendency for those people to spend more and more time watching television. 
D) the people who watch more television tend to have more need to be around others. 
A) as we observe people with higher and higher need for affiliation,we see a tendency for those people to spend less and less time watching television. 
B) there is not much of a relationship between the two variables because the r is negative. 
C) as we observe people with higher and higher need for affiliation,we see a tendency for those people to spend more and more time watching television. 
D) the people who watch more television tend to have more need to be around others.

Question 6

Which correlation coefficient should we use if we want to find out whether a relationship exists between two variables that are both interval or ratio variables?

Accepted Answer

A) The Pearson correlation coefficient 
B) The Spearman rank-order correlation coefficient 
C) The point-biserial correlation coefficient 
D) The nonlinear correlation coefficient 
A) The Pearson correlation coefficient 
B) The Spearman rank-order correlation coefficient 
C) The point-biserial correlation coefficient 
D) The nonlinear correlation coefficient

Question 7

Calculate the appropriate correlation coefficient for the following data

Accepted Answer

A) -0.68 
B) +0.72 
C) -0.41 
D) -0.93 
A) -0.68 
B) +0.72 
C) -0.41 
D) -0.93

Question 8

What statistic should be used to find out whether there is a relationship between high school class rank and first-semester college GPA rank?

Accepted Answer

A) The Pearson correlation coefficient 
B) The Spearman rank-order correlation coefficient 
C) The point-biserial correlation coefficient 
D) The nonlinear correlation coefficient 
A) The Pearson correlation coefficient 
B) The Spearman rank-order correlation coefficient 
C) The point-biserial correlation coefficient 
D) The nonlinear correlation coefficient

Question 9

What kind of relationship is depicted in the following graph?

Accepted Answer

A) A positive linear correlation 
B) A negative linear correlation 
C) No correlation 
D) A nonlinear correlation 
A) A positive linear correlation 
B) A negative linear correlation 
C) No correlation 
D) A nonlinear correlation

Question 10

What type of relationship does the following regression line represent?

Accepted Answer

A) A positive relationship 
B) A negative relationship 
C) A curvilinear relationship 
D) No relationship 
A) A positive relationship 
B) A negative relationship 
C) A curvilinear relationship 
D) No relationship

Question 11

If you see the notation   ,what should you do?

Accepted Answer

A) First multiply each X by its partner Y,then sum the results. 
B) First sum the Xs then multiply the sum of the Xs by each Y. 
C) First sum the Ys,then multiply the sum of the Ys by each X. 
D) First sum the Xs,then sum the Ys,then multiply the sums. 
A) First multiply each X by its partner Y,then sum the results. 
B) First sum the Xs then multiply the sum of the Xs by each Y. 
C) First sum the Ys,then multiply the sum of the Ys by each X. 
D) First sum the Xs,then sum the Ys,then multiply the sums.

Question 12

When the correlation coefficient representing the relationship between X and Y is intermediate,then all of the following are true except

Accepted Answer

A) there is not a perfectly consistent association. 
B) there are different Y scores associated with a single X score. 
C) prediction of Y from a known X score has some error. 
D) all data points fall on the regression line. 
A) there is not a perfectly consistent association. 
B) there are different Y scores associated with a single X score. 
C) prediction of Y from a known X score has some error. 
D) all data points fall on the regression line.

Question 13

Suppose a researcher has trained two observers to rank participants according to their level of frustration when trying to solve a puzzle.What statistic should be used to determine the extent to which the two observers agree in their rankings of frustration?

Accepted Answer

A) The Pearson correlation coefficient 
B) The Spearman rank-order correlation coefficient 
C) The point-biserial correlation coefficient 
D) The nonlinear correlation coefficient 
A) The Pearson correlation coefficient 
B) The Spearman rank-order correlation coefficient 
C) The point-biserial correlation coefficient 
D) The nonlinear correlation coefficient

Question 14

What does a correlation coefficient do?

Accepted Answer

A) It allows us to draw conclusions about whether one variable causes another variable. 
B) It creates a correlational design,rather than an experimental design. 
C) It quantifies the pattern in a relationship. 
D) It summarizes the X scores and the Y scores separately. 
A) It allows us to draw conclusions about whether one variable causes another variable. 
B) It creates a correlational design,rather than an experimental design. 
C) It quantifies the pattern in a relationship. 
D) It summarizes the X scores and the Y scores separately.

Question 15

Which relationship is stronger,r = +0.62 or r = -0.62?

Accepted Answer

A) An r = +0.62 represents a stronger relationship than r = -0.62. 
B) An r = -0.62 represents a stronger relationship than r = +0.62. 
C) There is no difference in the strength of the two relationships. 
D) Without seeing a scatterplot of the data,there is no way to determine which is stronger. 
A) An r = +0.62 represents a stronger relationship than r = -0.62. 
B) An r = -0.62 represents a stronger relationship than r = +0.62. 
C) There is no difference in the strength of the two relationships. 
D) Without seeing a scatterplot of the data,there is no way to determine which is stronger.

Question 16

Which of the following studies represents the weakest relationship?

Accepted Answer

A) Study A 
B) Study B 
C) Study C 
D) Cannot determine 
A) Study A 
B) Study B 
C) Study C 
D) Cannot determine

Question 17

"The self-confidence of a group of students is positively correlated with their chances of getting through the course." What does this statement mean?

Accepted Answer

A) The students will pass the course if they can be made to be self-confident. 
B) The chances of passing the course tend to increase as the self-confidence scores of the students increase. 
C) The chances of passing the course tend to decrease as the self-confidence scores of the students increase. 
D) Passing the course will make the students self-confident. 
A) The students will pass the course if they can be made to be self-confident. 
B) The chances of passing the course tend to increase as the self-confidence scores of the students increase. 
C) The chances of passing the course tend to decrease as the self-confidence scores of the students increase. 
D) Passing the course will make the students self-confident.

Question 18

If we compute a correlation on data that come only from the middle of the X distribution (restricted range)rather than from the entire range,the correlation is likely to be _____ the correlation from the entire range.

Accepted Answer

A) smaller than 
B) the same as 
C) a little larger than 
D) a lot larger than 
A) smaller than 
B) the same as 
C) a little larger than 
D) a lot larger than

Question 19

What statistic should be used to find out whether there is a relationship between hours spent participating in sports and GPA?

Accepted Answer

A) The Pearson correlation coefficient 
B) The Spearman rank-order correlation coefficient 
C) The point-biserial correlation coefficient 
D) The nonlinear correlation coefficient 
A) The Pearson correlation coefficient 
B) The Spearman rank-order correlation coefficient 
C) The point-biserial correlation coefficient 
D) The nonlinear correlation coefficient

Question 20

What kind of relationship is depicted in the following graph?

Accepted Answer

A) A positive linear correlation 
B) A negative linear correlation 
C) No correlation 
D) A nonlinear correlation 
A) A positive linear correlation 
B) A negative linear correlation 
C) No correlation 
D) A nonlinear correlation

What kind of relationship is depicted in the following graph?

Calculate the appropriate correlation coefficient for the following data.

Calculate the appropriate correlation coefficient for the following data.

In a study about the relationship between their age and women's attitudes about marriage,you survey over 500 undergraduate women and calculate a Pearson correlation coefficient.What mistake have you made?

Professor Miller has found that the correlation between a person's "need for affiliation" (found by taking a test to determine the need to be with others)and the number of hours spent watching television is 0.69.He should conclude that

Which correlation coefficient should we use if we want to find out whether a relationship exists between two variables that are both interval or ratio variables?

Calculate the appropriate correlation coefficient for the following data

What statistic should be used to find out whether there is a relationship between high school class rank and first-semester college GPA rank?

What kind of relationship is depicted in the following graph?

What type of relationship does the following regression line represent?

If you see the notation ,what should you do?

When the correlation coefficient representing the relationship between X and Y is intermediate,then all of the following are true except

Suppose a researcher has trained two observers to rank participants according to their level of frustration when trying to solve a puzzle.What statistic should be used to determine the extent to which the two observers agree in their rankings of frustration?

What does a correlation coefficient do?

Which relationship is stronger,r = +0.62 or r = -0.62?

Which of the following studies represents the weakest relationship?

"The self-confidence of a group of students is positively correlated with their chances of getting through the course." What does this statement mean?

If we compute a correlation on data that come only from the middle of the X distribution (restricted range)rather than from the entire range,the correlation is likely to be _____ the correlation from the entire range.

What statistic should be used to find out whether there is a relationship between hours spent participating in sports and GPA?

What kind of relationship is depicted in the following graph?

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Central Tendency;the Mean, median, and Mode

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

Linear Regression

Using Probability to Make Decisions About Data

Introduction to Hypothesis Testing

Performing the One-Sample T-Test and Testing Correlation Coefficients

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters

Exam 7: The Correlation Coefficient

What kind of relationship is depicted in the following graph?

Calculate the appropriate correlation coefficient for the following data.

Calculate the appropriate correlation coefficient for the following data.

In a study about the relationship between their age and women's attitudes about marriage,you survey over 500 undergraduate women and calculate a Pearson correlation coefficient.What mistake have you made?

Professor Miller has found that the correlation between a person's "need for affiliation" (found by taking a test to determine the need to be with others)and the number of hours spent watching television is 0.69.He should conclude that

Which correlation coefficient should we use if we want to find out whether a relationship exists between two variables that are both interval or ratio variables?

Calculate the appropriate correlation coefficient for the following data

What statistic should be used to find out whether there is a relationship between high school class rank and first-semester college GPA rank?

What kind of relationship is depicted in the following graph?

What type of relationship does the following regression line represent?

If you see the notation ,what should you do?

When the correlation coefficient representing the relationship between X and Y is intermediate,then all of the following are true except

Suppose a researcher has trained two observers to rank participants according to their level of frustration when trying to solve a puzzle.What statistic should be used to determine the extent to which the two observers agree in their rankings of frustration?

What does a correlation coefficient do?

Which relationship is stronger,r = +0.62 or r = -0.62?

Which of the following studies represents the weakest relationship?

"The self-confidence of a group of students is positively correlated with their chances of getting through the course." What does this statement mean?

If we compute a correlation on data that come only from the middle of the X distribution (restricted range)rather than from the entire range,the correlation is likely to be _____ the correlation from the entire range.

What statistic should be used to find out whether there is a relationship between hours spent participating in sports and GPA?

What kind of relationship is depicted in the following graph?

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Central Tendency;the Mean, median, and Mode

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

Linear Regression

Using Probability to Make Decisions About Data

Introduction to Hypothesis Testing

Performing the One-Sample T-Test and Testing Correlation Coefficients

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters