Question 1

Regarding the normal curve and standard deviation, which of the following statements is/are TRUE?

Accepted Answer

A) The standard deviation measures offset proportions of a normal curve that are above and below the mean. 
B) The distribution of chance events typically resembles a normal curve. 
C) The relationship of the standard deviation to the normal curve does not change, which makes it possible to compare groups of scores from distributions that are approximately normal. 
D) All of these statements are true. 
A) The standard deviation measures offset proportions of a normal curve that are above and below the mean. 
B) The distribution of chance events typically resembles a normal curve. 
C) The relationship of the standard deviation to the normal curve does not change, which makes it possible to compare groups of scores from distributions that are approximately normal. 
D) All of these statements are true.

Question 2

To find the percent of variance in one measure accounted for by knowing another measure you should square the

Accepted Answer

A) mean. 
B) z-score. 
C) Pearson r. 
D) standard deviation. 
A) mean. 
B) z-score. 
C) Pearson r. 
D) standard deviation.

Question 3

Regarding correlations, which of the following statements is FALSE?

Accepted Answer

A) It is impossible for two correlated variables to have a cause-and-effect relationship. 
B) We cannot conclude, solely on the basis of correlation, that a causal link exists. 
C) An experiment must be performed to establish a causal relationship. 
D) Often, two correlated measures are related as a result of the influence of a third variable. 
A) It is impossible for two correlated variables to have a cause-and-effect relationship. 
B) We cannot conclude, solely on the basis of correlation, that a causal link exists. 
C) An experiment must be performed to establish a causal relationship. 
D) Often, two correlated measures are related as a result of the influence of a third variable.

Question 4

Regarding correlations, which of the following statements is FALSE?

Accepted Answer

A) Correlations establish causation. 
B) Correlations help us to identify relationships that provide highly useful information. 
C) Many colleges have formulas that us multiple correlations to decide which applicants have the best chances for success. 
D) A useful tool for interpreting correlations involves calculating the percent variance. 
A) Correlations establish causation. 
B) Correlations help us to identify relationships that provide highly useful information. 
C) Many colleges have formulas that us multiple correlations to decide which applicants have the best chances for success. 
D) A useful tool for interpreting correlations involves calculating the percent variance.

Question 5

When plotted as a graph, a zero correlation forms a cluster of points in the shape of a(n)

Accepted Answer

A) diagonal oval to the right. 
B) diagonal oval to the left. 
C) inverted-U. 
D) circle. 
A) diagonal oval to the right. 
B) diagonal oval to the left. 
C) inverted-U. 
D) circle.

Question 6

The normal curve is a(n) _____ shaped distribution of behavioral variables found in the population.

Accepted Answer

A) z- 
B) t- 
C) s- 
D) bell- 
A) z- 
B) t- 
C) s- 
D) bell-

Question 7

The median is very sensitive to extremely high or low scores.

Accepted Answer

A) True 
 B)False

Question 8

The political science class randomly selected 150 adults from the community in order to obtain their opinions on the upcoming presidential race.This group of 150 people would be considered the

Accepted Answer

A) representative sample. 
B) experimental group. 
C) population. 
D) control group. 
A) representative sample. 
B) experimental group. 
C) population. 
D) control group.

Question 9

If one wants to find the median of an even number of scores, one

Accepted Answer

A) selects one of the two middle scores as the median. 
B) lists both middle scores as the median. 
C) averages the two scores that "share" the middle spot. 
D) cannot calculate a median on an even number of scores. 
A) selects one of the two middle scores as the median. 
B) lists both middle scores as the median. 
C) averages the two scores that "share" the middle spot. 
D) cannot calculate a median on an even number of scores.

Question 10

What percent of all cases are found between an SD of +2 and an SD of -2 on a normal curve?

Accepted Answer

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

Question 11

Correlations allow us to determine causation between to variables.

Accepted Answer

A) True 
 B)False

Question 12

The three basic types of descriptive statistics are graphical statistics, measures of central tendency, and measures of variability.

Accepted Answer

A) True 
 B)False

Question 13

A _____ is made by breaking down the entire range of possible scores into classes of equal size and then recording the number of scores falling into each class.

Accepted Answer

A) scatter diagram 
B) variability plot 
C) correlational matrix 
D) frequency distribution 
A) scatter diagram 
B) variability plot 
C) correlational matrix 
D) frequency distribution

Question 14

Researchers usually cannot use populations when doing their studies because populations are usually not representative of a sample.

Accepted Answer

A) True 
 B)False

Question 15

When measure X gets larger, measure Y gets smaller in 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 16

A correlation describes the _____ between two variables.

Accepted Answer

A) intersection 
B) commonality 
C) relationship 
D) none of these 
A) intersection 
B) commonality 
C) relationship 
D) none of these

Question 17

The largest possible coefficient of correlation is

Accepted Answer

A) 1. 
B) .001 
C) 100 
D) 10. 
A) 1. 
B) .001 
C) 100 
D) 10.

Question 18

When a psychologist wishes to generalize results to an entire population, he or she would use _____ statistics.

Accepted Answer

A) descriptive 
B) inferential 
C) holistic 
D) correlational 
A) descriptive 
B) inferential 
C) holistic 
D) correlational

Question 19

A histogram can be described as a type of

Accepted Answer

A) bar graph. 
B) polygon. 
C) frequency mode. 
D) class interval. 
A) bar graph. 
B) polygon. 
C) frequency mode. 
D) class interval.

Question 20

_____ statistics are used for decision-making, for generalizing from small samples, and for drawing conclusions.

Accepted Answer

A) Descriptive 
B) Inferential 
C) Nominal 
D) Ordinal 
A) Descriptive 
B) Inferential 
C) Nominal 
D) Ordinal

Exam 19: Appendix A: Behavioral Statistics

Regarding the normal curve and standard deviation, which of the following statements is/are TRUE?

To find the percent of variance in one measure accounted for by knowing another measure you should square the

Regarding correlations, which of the following statements is FALSE?

Regarding correlations, which of the following statements is FALSE?

When plotted as a graph, a zero correlation forms a cluster of points in the shape of a(n)

The normal curve is a(n) _____ shaped distribution of behavioral variables found in the population.

The median is very sensitive to extremely high or low scores.

The political science class randomly selected 150 adults from the community in order to obtain their opinions on the upcoming presidential race.This group of 150 people would be considered the

If one wants to find the median of an even number of scores, one

What percent of all cases are found between an SD of +2 and an SD of -2 on a normal curve?

Correlations allow us to determine causation between to variables.

The three basic types of descriptive statistics are graphical statistics, measures of central tendency, and measures of variability.

A _____ is made by breaking down the entire range of possible scores into classes of equal size and then recording the number of scores falling into each class.

Researchers usually cannot use populations when doing their studies because populations are usually not representative of a sample.

When measure X gets larger, measure Y gets smaller in a

A correlation describes the _____ between two variables.

The largest possible coefficient of correlation is

When a psychologist wishes to generalize results to an entire population, he or she would use _____ statistics.

A histogram can be described as a type of

_____ statistics are used for decision-making, for generalizing from small samples, and for drawing conclusions.

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