Question 1

A _____ correlation would show no relationship between the two variables.

Accepted Answer

A) negative 
B) null 
C) zero 
D) curvilinear 
A) negative 
B) null 
C) zero 
D) curvilinear

Question 2

One problem with the mean is that it

Accepted Answer

A) is very difficult to compute. 
B) is sensitive to extremely high or low scores. 
C) gives the score actually obtained by the greatest number of people. 
D) cannot be used in determining other statistical values. 
A) is very difficult to compute. 
B) is sensitive to extremely high or low scores. 
C) gives the score actually obtained by the greatest number of people. 
D) cannot be used in determining other statistical values.

Question 3

What percent of all cases are found between an SD of +1 and an SD of -1 on a normal curve?

Accepted Answer

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

Question 4

Dr.Little is interested in studying the effects of a new medication on children with asthma between the ages of 6 and 12.She gets permission to try the medication on asthma patients in several hospital clinics.In this example, the sample includes children

Accepted Answer

A) of all ages with asthma. 
B) with asthma between the ages of 6 and 12. 
C) with asthma ages 6 and 12 from the clinics where Dr.Little does her study. 
D) with asthma of all ages who do not receive medication. 
A) of all ages with asthma. 
B) with asthma between the ages of 6 and 12. 
C) with asthma ages 6 and 12 from the clinics where Dr.Little does her study. 
D) with asthma of all ages who do not receive medication.

Question 5

Vertical bars are used to indicate frequencies in a frequency polygon.

Accepted Answer

A) True 
 B)False

Question 6

Which is NOT a measure of central tendency?

Accepted Answer

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

Question 7

If two variables have a correlation of -1.00, then

Accepted Answer

A) a perfect negative relationship exists between them. 
B) a perfect positive relationship exists between them. 
C) a weak relationship or nonexistent relationship is present. 
D) it is not possible to tell the type of relationship that exists between them. 
A) a perfect negative relationship exists between them. 
B) a perfect positive relationship exists between them. 
C) a weak relationship or nonexistent relationship is present. 
D) it is not possible to tell the type of relationship that exists between them.

Question 8

If there is a correlation of .78 between socioeconomic status and IQ score, which of the following statements is TRUE?

Accepted Answer

A) A third variable such as education level may account for the relationship between socioeconomic status and IQ score. 
B) Higher socioeconomic status will have a causal impact on IQ scores. 
C) There is a weak relationship between socioeconomic status and IQ score. 
D) Decreases in IQ scores will automatically result in lower socioeconomic status. 
A) A third variable such as education level may account for the relationship between socioeconomic status and IQ score. 
B) Higher socioeconomic status will have a causal impact on IQ scores. 
C) There is a weak relationship between socioeconomic status and IQ score. 
D) Decreases in IQ scores will automatically result in lower socioeconomic status.

Question 9

A _____ is a mathematical relationship in which increases in one measure are matched by increases in the other (or decreases correspond with decreases).

Accepted Answer

A) zero correlation. 
B) variable relastionship. 
C) positive relationship. 
D) negative relationship. 
A) zero correlation. 
B) variable relastionship. 
C) positive relationship. 
D) negative relationship.

Question 10

Which of the following is the most basic measure of variability?

Accepted Answer

A) median 
B) average deviation 
C) standard deviation 
D) range 
A) median 
B) average deviation 
C) standard deviation 
D) range

Question 11

A coefficient of correlation that is close to zero indicates a _____ relationship.

Accepted Answer

A) perfect 
B) strong 
C) moderate 
D) weak 
A) perfect 
B) strong 
C) moderate 
D) weak

Question 12

A particular advantage of the standard deviation is that it

Accepted Answer

A) indicates the central tendency of a group of scores. 
B) gives the score actually obtained by the greatest number of people. 
C) does not require having to use the mean. 
D) can be used to "standardize" scores to give them more meaning. 
A) indicates the central tendency of a group of scores. 
B) gives the score actually obtained by the greatest number of people. 
C) does not require having to use the mean. 
D) can be used to "standardize" scores to give them more meaning.

Question 13

Which of the following is an example of the use of graphical statistics?

Accepted Answer

A) breaking down a set of math test scores into classes of equal size 
B) drawing a histogram based on a set of scores from a personality questionnaire 
C) graphing a set of IQ scores using a frequency polygon 
D) all of these 
A) breaking down a set of math test scores into classes of equal size 
B) drawing a histogram based on a set of scores from a personality questionnaire 
C) graphing a set of IQ scores using a frequency polygon 
D) all of these

Question 14

A bell-shaped distribution, with a large number of scores in the middle, tapering to very few extremely high and low scores is known as a negatively-skewed curve.

Accepted Answer

A) True 
 B)False

Question 15

The median is a measure of _____, while the range is a measure of _____.

Accepted Answer

A) central tendency; variability 
B) variability; central tendency 
C) correlation; dispersion 
D) dispersion; correlation 
A) central tendency; variability 
B) variability; central tendency 
C) correlation; dispersion 
D) dispersion; correlation

Question 16

Researchers usually cannot use populations when doing their studies because

Accepted Answer

A) populations are not representative of a sample. 
B) it is usually impractical or impossible. 
C) statistical methods are only applicable to sample groups. 
D) the requirement of randomness cannot be met. 
A) populations are not representative of a sample. 
B) it is usually impractical or impossible. 
C) statistical methods are only applicable to sample groups. 
D) the requirement of randomness cannot be met.

Question 17

The difference between the highest and lowest scores is known as the

Accepted Answer

A) range. 
B) average deviation. 
C) median. 
D) standard deviation. 
A) range. 
B) average deviation. 
C) median. 
D) standard deviation.

Question 18

Regarding statistics, which of the following statements is FALSE?

Accepted Answer

A) Statistics help us draw valid conclusions about what we have observed. 
B) Statistics bring greater clarity and precision to psychological thought and research. 
C) There are two major major types of statistics: frequency and graphical. 
D) Psychologists use statistics because they often have to base decisions on a limited amount of data. 
A) Statistics help us draw valid conclusions about what we have observed. 
B) Statistics bring greater clarity and precision to psychological thought and research. 
C) There are two major major types of statistics: frequency and graphical. 
D) Psychologists use statistics because they often have to base decisions on a limited amount of data.

Question 19

The more time students spend sleeping in class, the lower their grades are.This would be a

Accepted Answer

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

Question 20

The psychology test scores for five students are 100, 82, 96, 75, and 90.For this distribution of scores, the range is

Accepted Answer

A) 6. 
B) 14. 
C) 25. 
D) 36. 
A) 6. 
B) 14. 
C) 25. 
D) 36.

Exam 19: Appendix A: Behavioral Statistics

A _____ correlation would show no relationship between the two variables.

One problem with the mean is that it

What percent of all cases are found between an SD of +1 and an SD of -1 on a normal curve?

Dr.Little is interested in studying the effects of a new medication on children with asthma between the ages of 6 and 12.She gets permission to try the medication on asthma patients in several hospital clinics.In this example, the sample includes children

Vertical bars are used to indicate frequencies in a frequency polygon.

Which is NOT a measure of central tendency?

If two variables have a correlation of -1.00, then

If there is a correlation of .78 between socioeconomic status and IQ score, which of the following statements is TRUE?

A _____ is a mathematical relationship in which increases in one measure are matched by increases in the other (or decreases correspond with decreases).

Which of the following is the most basic measure of variability?

A coefficient of correlation that is close to zero indicates a _____ relationship.

A particular advantage of the standard deviation is that it

Which of the following is an example of the use of graphical statistics?

A bell-shaped distribution, with a large number of scores in the middle, tapering to very few extremely high and low scores is known as a negatively-skewed curve.

The median is a measure of _____, while the range is a measure of _____.

Researchers usually cannot use populations when doing their studies because

The difference between the highest and lowest scores is known as the

Regarding statistics, which of the following statements is FALSE?

The more time students spend sleeping in class, the lower their grades are.This would be a

The psychology test scores for five students are 100, 82, 96, 75, and 90.For this distribution of scores, the range is

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

The median is a measure of _, while the range is a measure of _.