Question 1

If two variables are correlated,the percentage of variation in one variable that can be predicted from the other variable

Accepted Answer

A)  increases for positive correlations and decreases for negative correlations. 
B)  increases for negative correlations and decreases for positive correlations. 
C)  increases as the magnitude of the correlation coefficient increases. 
D)  decreases as the magnitude of the correlation coefficient increases. 
A)  increases for positive correlations and decreases for negative correlations. 
B)  increases for negative correlations and decreases for positive correlations. 
C)  increases as the magnitude of the correlation coefficient increases. 
D)  decreases as the magnitude of the correlation coefficient increases.

Question 2

When the distribution of scores is symmetrical

Accepted Answer

A)  the mean, median, and mode are relatively far apart in value. 
B)  the mean, median, and mode are relatively close together in value. 
C)  only the median and mode are relatively close together in value. 
D)  only the mean and mode are relatively close together in value. 
A)  the mean, median, and mode are relatively far apart in value. 
B)  the mean, median, and mode are relatively close together in value. 
C)  only the median and mode are relatively close together in value. 
D)  only the mean and mode are relatively close together in value.

Question 3

The percentage of variation in one variable that can be predicted based on the other variable is known as the

Accepted Answer

A)  coefficient of determination. 
B)  standard deviation. 
C)  correlation coefficient. 
D)  mean. 
A)  coefficient of determination. 
B)  standard deviation. 
C)  correlation coefficient. 
D)  mean.

Question 4

Which of the following correlations will yield the highest coefficient of determination?

Accepted Answer

A)  -.70 
B)  -.40 
C)  .30 
D)  .50 
A)  -.70 
B)  -.40 
C)  .30 
D)  .50

Question 5

An inverse relationship between two variables will yield a

Accepted Answer

A)  negative correlation. 
B)  positive correlation. 
C)  weak correlation. 
D)  spurious correlation. 
A)  negative correlation. 
B)  positive correlation. 
C)  weak correlation. 
D)  spurious correlation.

Question 6

Yolanda has collected data on the relationship between the number of hours the employees at a large number of corporate headquarters spend working on their computers and the profits of the corporations.She finds that the correlation is about positive .75.A scatter diagram of Yolanda's data would show the data

Accepted Answer

A)  on a perfectly straight line from the bottom left corner to the top right corner. 
B)  clustering near a line running from the bottom left corner to the top right corner. 
C)  on a perfectly straight line from the bottom right corner to the top left corner. 
D)  clustering near a line running from the bottom right corner to the top left corner. 
A)  on a perfectly straight line from the bottom left corner to the top right corner. 
B)  clustering near a line running from the bottom left corner to the top right corner. 
C)  on a perfectly straight line from the bottom right corner to the top left corner. 
D)  clustering near a line running from the bottom right corner to the top left corner.

Question 7

Which measure of central tendency is obtained by adding all the scores and dividing that total by the number of scores?

Accepted Answer

A)  mode 
B)  median 
C)  mean 
D)  range 
A)  mode 
B)  median 
C)  mean 
D)  range

Question 8

The formula for the standard deviation is

Accepted Answer

A)  d²/n. 
B)  S X/n. 
C)  square root of Sd²/n. 
D)  square root of S X/n. 
A)  d²/n. 
B)  S X/n. 
C)  square root of Sd²/n. 
D)  square root of S X/n.

Question 9

What is the mode of the following set of scores: 1,2,5,6,6?

Accepted Answer

A)  2 
B)  4 
C)  5 
D)  6 
A)  2 
B)  4 
C)  5 
D)  6

Question 10

Manuela has collected data on the relationship between the number of hours the number of days the employees at a large number of factories call in sick and the productivity of the factories.She finds that the correlation is about negative .75.A scatter diagram of Manuela's data would show the data

Accepted Answer

A)  on a perfectly straight line from the bottom left corner to the top right corner. 
B)  clustering near a line running from the bottom left corner to the top right corner. 
C)  on a perfectly straight line from the bottom right corner to the top left corner. 
D)  clustering near a line running from the bottom right corner to the top left corner. 
A)  on a perfectly straight line from the bottom left corner to the top right corner. 
B)  clustering near a line running from the bottom left corner to the top right corner. 
C)  on a perfectly straight line from the bottom right corner to the top left corner. 
D)  clustering near a line running from the bottom right corner to the top left corner.

Question 11

When a trait is normally distributed,most scores fall ____ the center of the distribution and the number of scores ____ the center of the distribution.

Accepted Answer

A)  near; gradually decreases away from 
B)  away from; gradually decreases nearer 
C)  near; gradually increases away from 
D)  away from; gradually increases nearer 
A)  near; gradually decreases away from 
B)  away from; gradually decreases nearer 
C)  near; gradually increases away from 
D)  away from; gradually increases nearer

Question 12

Which of the following correlation coefficients represents the WEAKEST association between two variables?

Accepted Answer

A)  +.74 
B)  -.43 
C)  +.09 
D)  -.85 
A)  +.74 
B)  -.43 
C)  +.09 
D)  -.85

Question 13

Statistically significant results

Accepted Answer

A)  usually support the research hypothesis. 
B)  typically support the null hypothesis. 
C)  indicate the observed findings are due to chance. 
D)  indicate that the researcher has not made any errors in the calculations. 
A)  usually support the research hypothesis. 
B)  typically support the null hypothesis. 
C)  indicate the observed findings are due to chance. 
D)  indicate that the researcher has not made any errors in the calculations.

Question 14

A positive correlation is to a direct relationship as a negative correlation is to

Accepted Answer

A)  an ascending relationship. 
B)  a descending relationship. 
C)  an inverse relationship. 
D)  an inferential relationship. 
A)  an ascending relationship. 
B)  a descending relationship. 
C)  an inverse relationship. 
D)  an inferential relationship.

Question 15

Imagine that Jenilee earned the highest score in the entire class on the midterm exam,and the correlation between midterm exam scores and final exam scores is -0.02.If the final exam grades for Jenilee's class are 92,84,79,65,and 54,

Accepted Answer

A)  Jenilee most likely earned the score of 54. 
B)  it is impossible to predict Jenilee's final exam score because the correlation coefficient is so small. 
C)  Jenilee most likely earned the score of 92. 
D)  Jenilee most likely earned the score of 79. 
A)  Jenilee most likely earned the score of 54. 
B)  it is impossible to predict Jenilee's final exam score because the correlation coefficient is so small. 
C)  Jenilee most likely earned the score of 92. 
D)  Jenilee most likely earned the score of 79.

Question 16

Histograms and frequency polygons typically list possible scores on the ____ and indicate frequency of the scores on the ____.

Accepted Answer

A)  horizontal axis; vertical axis 
B)  vertical axis; horizontal axis 
C)  left side; right side 
D)  right side; left side 
A)  horizontal axis; vertical axis 
B)  vertical axis; horizontal axis 
C)  left side; right side 
D)  right side; left side

Question 17

When scores are "bunched up" in the center of a distribution,the

Accepted Answer

A)  mean will be relatively low. 
B)  standard deviation will be relatively low. 
C)  correlation coefficient will be a negative number. 
D)  standard deviation will be relatively high. 
A)  mean will be relatively low. 
B)  standard deviation will be relatively low. 
C)  correlation coefficient will be a negative number. 
D)  standard deviation will be relatively high.

Question 18

In a study,a researcher observes a ____ to draw conclusions about a much larger ____.

Accepted Answer

A)  population; sample 
B)  sample; population 
C)  sample; sample 
D)  population; inferential group 
A)  population; sample 
B)  sample; population 
C)  sample; sample 
D)  population; inferential group

Question 19

The use of mathematics to organize,summarize and interpret numerical data is known as

Accepted Answer

A)  statistical significance. 
B)  standard deviation. 
C)  statistics. 
D)  variability. 
A)  statistical significance. 
B)  standard deviation. 
C)  statistics. 
D)  variability.

Question 20

Julia has an IQ of 130.If the mean for IQ is 100 with a standard deviation of 15,what percentage of the population has an IQ greater than Julia's (assume a normal distribution)?

Accepted Answer

A)  0 percent 
B)  2.5 percent 
C)  32 percent 
D)  50 percent 
A)  0 percent 
B)  2.5 percent 
C)  32 percent 
D)  50 percent

If two variables are correlated,the percentage of variation in one variable that can be predicted from the other variable

When the distribution of scores is symmetrical

The percentage of variation in one variable that can be predicted based on the other variable is known as the

Which of the following correlations will yield the highest coefficient of determination?

An inverse relationship between two variables will yield a

Which measure of central tendency is obtained by adding all the scores and dividing that total by the number of scores?

The formula for the standard deviation is

What is the mode of the following set of scores: 1,2,5,6,6?

Manuela has collected data on the relationship between the number of hours the number of days the employees at a large number of factories call in sick and the productivity of the factories.She finds that the correlation is about negative .75.A scatter diagram of Manuela's data would show the data

When a trait is normally distributed,most scores fall the center of the distribution and the number of scores the center of the distribution.

Which of the following correlation coefficients represents the WEAKEST association between two variables?

Statistically significant results

A positive correlation is to a direct relationship as a negative correlation is to

Imagine that Jenilee earned the highest score in the entire class on the midterm exam,and the correlation between midterm exam scores and final exam scores is -0.02.If the final exam grades for Jenilee's class are 92,84,79,65,and 54,

Histograms and frequency polygons typically list possible scores on the and indicate frequency of the scores on the .

When scores are "bunched up" in the center of a distribution,the

In a study,a researcher observes a to draw conclusions about a much larger .

The use of mathematics to organize,summarize and interpret numerical data is known as

Julia has an IQ of 130.If the mean for IQ is 100 with a standard deviation of 15,what percentage of the population has an IQ greater than Julia's (assume a normal distribution)?

The Evolution of Psychology

The Research Enterprise in Psychology

The Biological Bases of Behavior

Sensation and Perception

Variations in Consciousness

Learning

Human Memory

Language and Thought

Intelligence and Psychological Testing

Motivation and Emotion

Human Development Across the Life Span

Personality

Social Behavior

Stress,Coping,and Health

Psychological Disorders

Treatment of Psychological Disorders

Industrial organizational Psychology

Psychology and Environmental Sustainability: Conservation Psychology

Filters

Exam 17: Statistical Methods

If two variables are correlated,the percentage of variation in one variable that can be predicted from the other variable

When the distribution of scores is symmetrical

The percentage of variation in one variable that can be predicted based on the other variable is known as the

Which of the following correlations will yield the highest coefficient of determination?

An inverse relationship between two variables will yield a

Which measure of central tendency is obtained by adding all the scores and dividing that total by the number of scores?

The formula for the standard deviation is

What is the mode of the following set of scores: 1,2,5,6,6?

Manuela has collected data on the relationship between the number of hours the number of days the employees at a large number of factories call in sick and the productivity of the factories.She finds that the correlation is about negative .75.A scatter diagram of Manuela's data would show the data

When a trait is normally distributed,most scores fall ____ the center of the distribution and the number of scores ____ the center of the distribution.

Which of the following correlation coefficients represents the WEAKEST association between two variables?

Statistically significant results

A positive correlation is to a direct relationship as a negative correlation is to

Imagine that Jenilee earned the highest score in the entire class on the midterm exam,and the correlation between midterm exam scores and final exam scores is -0.02.If the final exam grades for Jenilee's class are 92,84,79,65,and 54,

Histograms and frequency polygons typically list possible scores on the ____ and indicate frequency of the scores on the ____.

When scores are "bunched up" in the center of a distribution,the

In a study,a researcher observes a ____ to draw conclusions about a much larger ____.

The use of mathematics to organize,summarize and interpret numerical data is known as

Julia has an IQ of 130.If the mean for IQ is 100 with a standard deviation of 15,what percentage of the population has an IQ greater than Julia's (assume a normal distribution)?

The Evolution of Psychology

The Research Enterprise in Psychology

The Biological Bases of Behavior

Sensation and Perception

Variations in Consciousness

Learning

Human Memory

Language and Thought

Intelligence and Psychological Testing

Motivation and Emotion

Human Development Across the Life Span

Personality

Social Behavior

Stress,Coping,and Health

Psychological Disorders

Treatment of Psychological Disorders

Industrial organizational Psychology

Psychology and Environmental Sustainability: Conservation Psychology

Filters

When a trait is normally distributed,most scores fall the center of the distribution and the number of scores the center of the distribution.

Histograms and frequency polygons typically list possible scores on the and indicate frequency of the scores on the .

In a study,a researcher observes a to draw conclusions about a much larger .