Question 1

The range and standard deviation are measures of

Accepted Answer

A) central tendency. 
B) variability. 
C) frequency distribution. 
D) correlation. 
A) central tendency. 
B) variability. 
C) frequency distribution. 
D) correlation. B

Question 2

An effective way to make sure that a sample is representative is to

Accepted Answer

A) use random selection. 
B) calculate the correlation coefficient. 
C) make sure that the standard deviation is low. 
D) use a scatter diagram. 
A) use random selection. 
B) calculate the correlation coefficient. 
C) make sure that the standard deviation is low. 
D) use a scatter diagram. A

Question 3

If a correlation is -1.00, a _____ relationship exists.

Accepted Answer

A) perfect negative 
B) moderately strong 
C) weak 
D) nonexistent 
A) perfect negative 
B) moderately strong 
C) weak 
D) nonexistent A

Question 4

When using correlation, we CANNOT

Accepted Answer

A) determine the direction of the relationship. 
B) conclude that a cause-and-effect relationship exists. 
C) use it to make a prediction. 
D) determine the strength of the relationship. 
A) determine the direction of the relationship. 
B) conclude that a cause-and-effect relationship exists. 
C) use it to make a prediction. 
D) determine the strength of the relationship.

Question 5

If the mean of a test is 80 and the standard deviation is 10, a person with a z-score of -2.0 scored _____ on the test.

Accepted Answer

A) 40 
B) 50 
C) 60 
D) 70 
A) 40 
B) 50 
C) 60 
D) 70

Question 6

A researcher studies the effects of a new therapy on a small group of depressed individuals in the hopes of generalizing these findings for use with all depressed people.This researcher is using

Accepted Answer

A) descriptive statistics. 
B) normative statistics. 
C) inferential statistics. 
D) random statistics. 
A) descriptive statistics. 
B) normative statistics. 
C) inferential statistics. 
D) random statistics.

Question 7

What percent of all cases are found between an SD of +3 and an SD of -3 on a normal curve?

Accepted Answer

A) 50 
B) 68 
C) 95 
D) 99 
A) 50 
B) 68 
C) 95 
D) 99

Question 8

Which of the following correlation coefficents indicates the strongest relationship?

Accepted Answer

A) +.79 
B) -.85 
C) -1.27 
D) +.35 
A) +.79 
B) -.85 
C) -1.27 
D) +.35

Question 9

Given these scores 22, 44, 33, 55, 33, 22, 44, 22, 55, 22, the mode is

Accepted Answer

A) 22. 
B) 33. 
C) 44. 
D) 55. 
A) 22. 
B) 33. 
C) 44. 
D) 55.

Question 10

Which of the following correlation coefficents indicates the weakest relationship?

Accepted Answer

A) +.29 
B) -.65 
C) -1.03 
D) +.75 
A) +.29 
B) -.65 
C) -1.03 
D) +.75

Question 11

In order to convert a number to a z-score, it is necessary to know the mean and the _____ of a group of scores.

Accepted Answer

A) range 
B) correlation 
C) mode 
D) standard deviation 
A) range 
B) correlation 
C) mode 
D) standard deviation

Question 12

The closer the correlation coefficient is to +1.00 or -1.00, the _____ the relationship.

Accepted Answer

A) weaker 
B) stronger 
C) more variable 
D) harder it becomes to predict 
A) weaker 
B) stronger 
C) more variable 
D) harder it becomes to predict

Question 13

Measures of variability belong to which of the following?

Accepted Answer

A) nominal scales 
B) ordinal scales 
C) descriptive statistics 
D) inferential statistics 
A) nominal scales 
B) ordinal scales 
C) descriptive statistics 
D) inferential statistics

Question 14

If the mean on a test is 90 and the standard deviation is 10, a person with a z-score of -1.0 scored 110 on the test.

Accepted Answer

A) True 
 B)False

Question 15

A psychologist concludes his method would be effective for teaching math to all third graders on the basis of testing it on a selected group of third graders with a control group for comparison.He is making use of

Accepted Answer

A) descriptive statistics. 
B) correlations. 
C) inferential statistics. 
D) z-scores. 
A) descriptive statistics. 
B) correlations. 
C) inferential statistics. 
D) z-scores.

Question 16

Which of the following is a measure of variability?

Accepted Answer

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

Question 17

The _____ measures offset proportions of a normal curve that are above and below the mean.

Accepted Answer

A) standard deviation 
B) median 
C) mode 
D) coefficient of correlation 
A) standard deviation 
B) median 
C) mode 
D) coefficient of correlation

Question 18

Regarding frequency distributions, which of the following statements is FALSE?

Accepted Answer

A) The entire range of possible scores is broken down into classes of equal size. 
B) Scores are often expressed graphically to make them more "visual." 
C) Scores are listed in random order. 
D) Large amounts of numerical information can be clearly organized. 
A) The entire range of possible scores is broken down into classes of equal size. 
B) Scores are often expressed graphically to make them more "visual." 
C) Scores are listed in random order. 
D) Large amounts of numerical information can be clearly organized.

Question 19

_____ statistics are used to summarize numerical data, while _____ statistics are used for decision making and generalizing from small samples.

Accepted Answer

A) Nominal; ordinal 
B) Ordinal; nominal 
C) Descriptive; inferential 
D) Inferential; descriptive 
A) Nominal; ordinal 
B) Ordinal; nominal 
C) Descriptive; inferential 
D) Inferential; descriptive

Question 20

Research has shown that such characteristics such as height, memory span, and intelligence are

Accepted Answer

A) positively correlated. 
B) negatively correlated. 
C) distributed along a normal curve. 
D) none of these. 
A) positively correlated. 
B) negatively correlated. 
C) distributed along a normal curve. 
D) none of these.

Exam 19: Appendix A: Behavioral Statistics

The range and standard deviation are measures of

An effective way to make sure that a sample is representative is to

If a correlation is -1.00, a _____ relationship exists.

When using correlation, we CANNOT

If the mean of a test is 80 and the standard deviation is 10, a person with a z-score of -2.0 scored _____ on the test.

A researcher studies the effects of a new therapy on a small group of depressed individuals in the hopes of generalizing these findings for use with all depressed people.This researcher is using

What percent of all cases are found between an SD of +3 and an SD of -3 on a normal curve?

Which of the following correlation coefficents indicates the strongest relationship?

Given these scores 22, 44, 33, 55, 33, 22, 44, 22, 55, 22, the mode is

Which of the following correlation coefficents indicates the weakest relationship?

In order to convert a number to a z-score, it is necessary to know the mean and the _____ of a group of scores.

The closer the correlation coefficient is to +1.00 or -1.00, the _____ the relationship.

Measures of variability belong to which of the following?

If the mean on a test is 90 and the standard deviation is 10, a person with a z-score of -1.0 scored 110 on the test.

A psychologist concludes his method would be effective for teaching math to all third graders on the basis of testing it on a selected group of third graders with a control group for comparison.He is making use of

Which of the following is a measure of variability?

The _____ measures offset proportions of a normal curve that are above and below the mean.

Regarding frequency distributions, which of the following statements is FALSE?

_____ statistics are used to summarize numerical data, while _____ statistics are used for decision making and generalizing from small samples.

Research has shown that such characteristics such as height, memory span, and intelligence are

Introduction the Psychology

Extension A: Introduction to Psychology and Research Methods

Extension B: Introduction to Psychology and Research Methods

Extension C: Introduction to Psychology and Research Methods

Extension A: Brain and Behavior

Extension B: Brain and Behavior

Extension C: Brain and Behavior

Extension A: Human Development

Extension B: Human Development

Extension C: Human Development

Extension D: Human Development

Extension A: Sensation and Reality

Extension B: Sensation and Reality

Extension A: Perceiving the World

Extension B: Perceiving the World

Extension A: States of Consciousness

Extension B: States of Consciousness

Extension C: States of Consciousness

Extension D: States of Consciousness

Extension A: Conditioning and Learning

Extension B: Conditioning and Learning

Extension C: Conditioning and Learning

Extension A: Memory

Extension B: Memory

Extension C: Memory

Extension A: Cognition, Language, Creativity, and Intelligence

Extension B: Cognition, Language, Creativity, and Intelligence

Extension C: Cognition, Language, Creativity, and Intelligence

Extension D: Cognition, Language, Creativity, and Intelligence

Extension A: Motivation and Emotion

Extension B: Motivation and Emotion

Extension C: Motivation and Emotion

Extension D: Motivation and Emotion

Extension A: Gender and Sexuality

Extension B: Gender and Sexuality

Extension C: Gender and Sexuality

Extension A: Personality

Extension B: Personality

Extension C: Personality

Extension D: Personality

Extension A: Health, Stress, and Coping

Extension B: Health, Stress, and Coping

Extension C: Health, Stress, and Coping

Extension A: Psychological Disorders

Extension B: Psychological Disorders

Extension C: Psychological Disorders

Extension D: Psychological Disorders

Extension A: Therapies

Extension B: Therapies

Extension C: Therapies

Extension D: Therapies

Extension A: Social Thinking and Social Influence

Extension B: Social Thinking and Social Influence

Extension C: Social Thinking and Social Influence

Extension A: Prosocial and Antisocial Behavior

Extension B: Prosocial and Antisocial Behavior

Extension C: Prosocial and Antisocial Behavior

Extension A: Applied Psychology

Extension B: Applied Psychology

_ statistics are used to summarize numerical data, while _ statistics are used for decision making and generalizing from small samples.