Question 1

When a trait has a normal distribution,the unit of measurement used to assess where any score falls in the distribution is the

Accepted Answer

A)  variability. 
B)  standard deviation. 
C)  mean. 
D)  correlation coefficient. 
A)  variability. 
B)  standard deviation. 
C)  mean. 
D)  correlation coefficient.

Question 2

Which of the following statements BEST describes a skewed distribution?

Accepted Answer

A)  the distribution is symmetrical or balanced 
B)  the distribution is not symmetrical or balanced 
C)  many scores in the distribution are high 
D)  many scores in the distribution are low 
A)  the distribution is symmetrical or balanced 
B)  the distribution is not symmetrical or balanced 
C)  many scores in the distribution are high 
D)  many scores in the distribution are low

Question 3

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

Accepted Answer

A)  -.88 
B)  -.42 
C)  +.30 
D)  +.65 
A)  -.88 
B)  -.42 
C)  +.30 
D)  +.65

Question 4

In both bar graphs and frequency polygons,the horizontal axis is typically used to indicate

Accepted Answer

A)  all the possible scores in a data set. 
B)  the frequency of each score in a data set. 
C)  the average scores for the entire data set. 
D)  the strength of the correlation among the scores in a data set. 
A)  all the possible scores in a data set. 
B)  the frequency of each score in a data set. 
C)  the average scores for the entire data set. 
D)  the strength of the correlation among the scores in a data set.

Question 5

Jackie correlates the number of hours spent studying with final grades in a course and finds the correlation is +0.55.When Phil correlates the number of classes missed with final grades in a course,he finds the correlation is -0.75.You should predict that,when the results are plotted using a scatter diagram,

Accepted Answer

A)  Jackie's data points will cluster more tightly than Phil's data points. 
B)  all Phil's data points will fall on a flat horizontal line running from left to right. 
C)  Phil's data points will cluster more tightly than Jackie's data points. 
D)  all Jackie's data points will fall on a vertical line running from top to bottom. 
A)  Jackie's data points will cluster more tightly than Phil's data points. 
B)  all Phil's data points will fall on a flat horizontal line running from left to right. 
C)  Phil's data points will cluster more tightly than Jackie's data points. 
D)  all Jackie's data points will fall on a vertical line running from top to bottom.

Question 6

A histogram is a

Accepted Answer

A)  graph that represents a symmetrical or bell-shaped curve. 
B)  bar graph that presents data from a frequency distribution. 
C)  line figure that presents data from a frequency distribution. 
D)  graph in which paired scores for each subject are plotted as single points. 
A)  graph that represents a symmetrical or bell-shaped curve. 
B)  bar graph that presents data from a frequency distribution. 
C)  line figure that presents data from a frequency distribution. 
D)  graph in which paired scores for each subject are plotted as single points.

Question 7

Statistics designed to help one draw conclusions from a set of data are referred to as

Accepted Answer

A)  descriptive statistics. 
B)  frequency statistics. 
C)  nonparametric statistics. 
D)  inferential statistics. 
A)  descriptive statistics. 
B)  frequency statistics. 
C)  nonparametric statistics. 
D)  inferential statistics.

Question 8

Researchers use statistics to do all of the following EXCEPT

Accepted Answer

A)  to interpret numerical data. 
B)  to collect numerical data. 
C)  to summarize numerical data. 
D)  to organize numerical data. 
A)  to interpret numerical data. 
B)  to collect numerical data. 
C)  to summarize numerical data. 
D)  to organize numerical data.

Question 9

In a normal distribution,____ of the scores fall within plus or minus 1 standard deviation of the mean.

Accepted Answer

A)  24 percent 
B)  50 percent 
C)  68 percent 
D)  99 percent 
A)  24 percent 
B)  50 percent 
C)  68 percent 
D)  99 percent

Question 10

Scores pile up at the low end of the scale in

Accepted Answer

A)  a negatively skewed distribution. 
B)  a positively skewed distribution. 
C)  any skewed distribution. 
D)  a normal distribution. 
A)  a negatively skewed distribution. 
B)  a positively skewed distribution. 
C)  any skewed distribution. 
D)  a normal distribution.

Question 11

When a distribution of scores includes a few extreme scores (either extremely high or extremely low)the ____ usually provides the best index of central tendency.

Accepted Answer

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

Question 12

Nelson's company manufactures computer games,and Nelson is interested in the relationship between the price of a game and people's ratings of the game's quality.He surveys 1000 customers,selected at random,and finds the correlation between price and quality is +0.50.Based on this information,Nelson can conclude that

Accepted Answer

A)  people perceive the quality of a game to be better when the price is high than when the price is low. 
B)  increasing the price of a game will increase the perceived quality of the game for approximately 50% of consumers. 
C)  people perceive the quality of a game to be better when the price is low than when the price is high. 
D)  decreasing the price of a game will increase the perceived quality of the game for approximately 50% of consumers. 
A)  people perceive the quality of a game to be better when the price is high than when the price is low. 
B)  increasing the price of a game will increase the perceived quality of the game for approximately 50% of consumers. 
C)  people perceive the quality of a game to be better when the price is low than when the price is high. 
D)  decreasing the price of a game will increase the perceived quality of the game for approximately 50% of consumers.

Question 13

An index of the amount of variability that exists in a distribution of scores is the

Accepted Answer

A)  central tendency. 
B)  standard deviation. 
C)  frequency distribution. 
D)  correlation coefficient. 
A)  central tendency. 
B)  standard deviation. 
C)  frequency distribution. 
D)  correlation coefficient.

Question 14

When a correlation is perfect,the data points in a scatter diagram

Accepted Answer

A)  form a bell-shaped curve. 
B)  fall in a straight line. 
C)  scatter in a symmetric oval. 
D)  scatter in a perfect circle. 
A)  form a bell-shaped curve. 
B)  fall in a straight line. 
C)  scatter in a symmetric oval. 
D)  scatter in a perfect circle.

Question 15

Psychological tests are relative measures.It is possible to assess how people score on a trait in comparison to other people using the

Accepted Answer

A)  correlation. 
B)  scatter diagram. 
C)  normal distribution. 
D)  research hypothesis. 
A)  correlation. 
B)  scatter diagram. 
C)  normal distribution. 
D)  research hypothesis.

Question 16

Beth has designed a study to examine whether a new method of learning historical facts will improve the ability of sixth-grade students to recall such facts.The assumption that there will be no difference in the recall ability of a group of sixth graders who use the new method,and those who do not,is the

Accepted Answer

A)  alternative hypothesis. 
B)  null hypothesis. 
C)  inferential hypothesis. 
D)  research hypothesis. 
A)  alternative hypothesis. 
B)  null hypothesis. 
C)  inferential hypothesis. 
D)  research hypothesis.

Question 17

It is safe to say that the "bedrock" of the scoring system for most psychological tests is the

Accepted Answer

A)  frequency polygon. 
B)  central tendency. 
C)  correlation coefficient. 
D)  normal distribution. 
A)  frequency polygon. 
B)  central tendency. 
C)  correlation coefficient. 
D)  normal distribution.

Question 18

If the correlation between intelligence and college grade point average is .60,then intelligence appears to account for about ____ of the variation in grade point average.

Accepted Answer

A)  40 percent 
B)  36 percent 
C)  60 percent 
D)  90 percent 
A)  40 percent 
B)  36 percent 
C)  60 percent 
D)  90 percent

Question 19

Dr.Trane wants to create a line figure to present her data that would indicate the frequency of each score.Dr.Trane will be MOST likely to use a

Accepted Answer

A)  scatterplot. 
B)  frequency distribution. 
C)  histogram. 
D)  frequency polygon. 
A)  scatterplot. 
B)  frequency distribution. 
C)  histogram. 
D)  frequency polygon.

Question 20

Lydia has designed a study to examine whether a new method of learning historical facts will improve the ability of sixth-grade students to recall such facts.Her prediction that the new method will improve memory is her

Accepted Answer

A)  alternative hypothesis. 
B)  null hypothesis. 
C)  inferential hypothesis. 
D)  research hypothesis. 
A)  alternative hypothesis. 
B)  null hypothesis. 
C)  inferential hypothesis. 
D)  research hypothesis.

When a trait has a normal distribution,the unit of measurement used to assess where any score falls in the distribution is the

Which of the following statements BEST describes a skewed distribution?

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

In both bar graphs and frequency polygons,the horizontal axis is typically used to indicate

A histogram is a

Statistics designed to help one draw conclusions from a set of data are referred to as

Researchers use statistics to do all of the following EXCEPT

In a normal distribution,____ of the scores fall within plus or minus 1 standard deviation of the mean.

Scores pile up at the low end of the scale in

When a distribution of scores includes a few extreme scores (either extremely high or extremely low)the ____ usually provides the best index of central tendency.

An index of the amount of variability that exists in a distribution of scores is the

When a correlation is perfect,the data points in a scatter diagram

Psychological tests are relative measures.It is possible to assess how people score on a trait in comparison to other people using the

It is safe to say that the "bedrock" of the scoring system for most psychological tests is the

If the correlation between intelligence and college grade point average is .60,then intelligence appears to account for about ____ of the variation in grade point average.

Dr.Trane wants to create a line figure to present her data that would indicate the frequency of each score.Dr.Trane will be MOST likely to use a

Lydia has designed a study to examine whether a new method of learning historical facts will improve the ability of sixth-grade students to recall such facts.Her prediction that the new method will improve memory is her

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

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Exam 17: Statistical Methods

When a trait has a normal distribution,the unit of measurement used to assess where any score falls in the distribution is the

Which of the following statements BEST describes a skewed distribution?

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

In both bar graphs and frequency polygons,the horizontal axis is typically used to indicate

A histogram is a

Statistics designed to help one draw conclusions from a set of data are referred to as

Researchers use statistics to do all of the following EXCEPT

In a normal distribution,____ of the scores fall within plus or minus 1 standard deviation of the mean.

Scores pile up at the low end of the scale in

When a distribution of scores includes a few extreme scores (either extremely high or extremely low)the ____ usually provides the best index of central tendency.

An index of the amount of variability that exists in a distribution of scores is the

When a correlation is perfect,the data points in a scatter diagram

Psychological tests are relative measures.It is possible to assess how people score on a trait in comparison to other people using the

It is safe to say that the "bedrock" of the scoring system for most psychological tests is the

If the correlation between intelligence and college grade point average is .60,then intelligence appears to account for about ____ of the variation in grade point average.

Dr.Trane wants to create a line figure to present her data that would indicate the frequency of each score.Dr.Trane will be MOST likely to use a

Lydia has designed a study to examine whether a new method of learning historical facts will improve the ability of sixth-grade students to recall such facts.Her prediction that the new method will improve memory is her

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