Question 1

The square root of Sd2/n is the formula for 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. B

Question 2

Scores on standardized intelligence tests are normally distributed with a mean of 100 and a standard deviation of 15. This means that

Accepted Answer

A)  50% of the population scores between 70 and 100 on standardized intelligence tests. 
B)  only 5% of the population scores higher than 130 or lower than 70 on standardized intelligence tests. 
C)  only 5% of the population scores higher than 115 or lower than 85 on standardized intelligence tests. 
D)  95% of the population scores between 100 and 130 on standardized intelligence tests. 
A)  50% of the population scores between 70 and 100 on standardized intelligence tests. 
B)  only 5% of the population scores higher than 130 or lower than 70 on standardized intelligence tests. 
C)  only 5% of the population scores higher than 115 or lower than 85 on standardized intelligence tests. 
D)  95% of the population scores between 100 and 130 on standardized intelligence tests. B

Question 3

If you add all the scores in a group of scores together and divide by the number of scores, the result is the

Accepted Answer

A)  variability. 
B)  median. 
C)  mean. 
D)  mode. 
A)  variability. 
B)  median. 
C)  mean. 
D)  mode. C

Question 4

In research, the assumption that no relationship exists between two variables is referred to as 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 5

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 6

Aster knows that the distribution of incomes for university students has a strong positive skew. In this case the best index of central tendency for Aster to use would be the

Accepted Answer

A)  median. 
B)  mode. 
C)  mean. 
D)  standard deviation. 
A)  median. 
B)  mode. 
C)  mean. 
D)  standard deviation.

Question 7

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 8

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 9

Kurt 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. His scatter diagram of the data shows it clusters near a line running from the bottom left corner to the top right corner

Accepted Answer

A)  variable. 
B)  zero. 
C)  positive. 
D)  negative. 
A)  variable. 
B)  zero. 
C)  positive. 
D)  negative.

Question 10

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 11

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 12

If you take a test and score at the 70th percentile, you have

Accepted Answer

A)  answered 70 percent of the questions correctly. 
B)  scored lower than 70 percent of the people taking the test. 
C)  scored higher than 70 percent of the people taking the test. 
D)  scored higher than 30 percent of the people taking the test. 
A)  answered 70 percent of the questions correctly. 
B)  scored lower than 70 percent of the people taking the test. 
C)  scored higher than 70 percent of the people taking the test. 
D)  scored higher than 30 percent of the people taking the test.

Question 13

Techniques to graphically represent the frequency of scores in a set of data include

Accepted Answer

A)  histograms and frequency polygons. 
B)  frequency distributions and frequency polygons. 
C)  frequency distributions and scatter diagrams. 
D)  histograms and scatter diagrams. 
A)  histograms and frequency polygons. 
B)  frequency distributions and frequency polygons. 
C)  frequency distributions and scatter diagrams. 
D)  histograms and scatter diagrams.

Question 14

The two major strengths of the empirical approach are

Accepted Answer

A)  it reveals facts and truths. 
B)  there is a chance one will discover errors in thinking. 
C)  its precision and intolerance for error. 
D)  there is no chance one's conclusion will be wrong. 
A)  it reveals facts and truths. 
B)  there is a chance one will discover errors in thinking. 
C)  its precision and intolerance for error. 
D)  there is no chance one's conclusion will be wrong.

Question 15

If you take a test in which the scores are normally distributed and you score at the 40th percentile, you have scored ____ the mean and ____ the median.

Accepted Answer

A)  above; above 
B)  above; below 
C)  below; above 
D)  below; below 
A)  above; above 
B)  above; below 
C)  below; above 
D)  below; below

Question 16

A numerical index of the degree of relationship between two variables is known as the

Accepted Answer

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

Question 17

Your psychology professor wants to organize and summarize the scores on the first psychology test; which type of statistics is your professor MOST likely to use?

Accepted Answer

A)  descriptive statistics 
B)  inferential statistics 
C)  correlational statistics 
D)  significant statistics 
A)  descriptive statistics 
B)  inferential statistics 
C)  correlational statistics 
D)  significant statistics

Question 18

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 19

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 20

The marketing agent for a professional sports franchise conducts a survey asking people how much they support the construction of a new sports stadium. Almost everyone who takes part in the survey indicates they are strongly in favor of a new stadium; there are just a few respondents who think a new stadium would be a bad idea. When the results from the survey are plotted in a histogram, the distribution will be

Accepted Answer

A)  positively skewed. 
B)  symmetrical. 
C)  impossible to predict without more information. 
D)  negatively skewed. 
A)  positively skewed. 
B)  symmetrical. 
C)  impossible to predict without more information. 
D)  negatively skewed.

Exam 35: Statistical Methods

The square root of Sd2/n is the formula for the

Scores on standardized intelligence tests are normally distributed with a mean of 100 and a standard deviation of 15. This means that

If you add all the scores in a group of scores together and divide by the number of scores, the result is the

In research, the assumption that no relationship exists between two variables is referred to as the

Aster knows that the distribution of incomes for university students has a strong positive skew. In this case the best index of central tendency for Aster to use would be the

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,

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

If you take a test and score at the 70th percentile, you have

Techniques to graphically represent the frequency of scores in a set of data include

The two major strengths of the empirical approach are

If you take a test in which the scores are normally distributed and you score at the 40th percentile, you have scored ____ the mean and ____ the median.

A numerical index of the degree of relationship between two variables is known as the

Your psychology professor wants to organize and summarize the scores on the first psychology test; which type of statistics is your professor MOST likely to use?

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

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

The Evolution of Psychology Part 1

The Evolution of Psychology Part 2

The Research Enterprise in Psychology Part 1

The Research Enterprise in Psychology Part 2

The Biological Bases of Behavior Part 1

The Biological Bases of Behavior Part 2

Sensation and Perception Part 1

Sensation and Perception Part 2

Variations in Consciousness Part 1

Variations in Consciousness Part 2

Learning Part 1

Learning Part 2

Human Memory Part 1

Human Memory Part 2

Language and Thought Part 1

Language and Thought Part 2

Intelligence and Psychological Testing Part 1

Intelligence and Psychological Testing Part 2

Motivation and Emotion Part 1

Motivation and Emotion Part 2

Human Development Across the Life Span Part 1

Human Development Across the Life Span Part 2

Personality: Theory, Research, and Assessment Part 1

Personality: Theory, Research, and Assessment Part 2

Stress, Coping, and Health Part 1

Stress, Coping, and Health Part 2

Psychological Disorders Part 1

Psychological Disorders Part 2

Treatment of Psychological Disorders Part 1

Treatment of Psychological Disorders Part 2

Social Behavior Part 1

Social Behavior Part 2

Careers in Psychology

Industrialorganizational Psychology

Filters

The square root of Sd²/n is the formula for the

If you take a test in which the scores are normally distributed and you score at the 40th percentile, you have scored the mean and the median.

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