Question 1

One use of statistics is to organize and summarize data. Which statistics are used for this purpose?

Accepted Answer

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

Question 2

Which statistical concept refers to how much the scores in a distribution tend to differ from the mean?

Accepted Answer

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

Question 3

What is the term for the assumption that there is no true relationship between two variables?

Accepted Answer

A) default hypothesis 
B) null hypothesis 
C) predictive hypothesis 
D) research hypothesis 
A) default hypothesis 
B) null hypothesis 
C) predictive hypothesis 
D) research hypothesis

Question 4

What is NOT one of the uses of statistics?

Accepted Answer

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

Question 5

Which correlation coefficient would be illustrated by a scatter diagram with points scattered farthest from the straight line?

Accepted Answer

A) -.77 
B) -.44 
C) +.22 
D) +.66 
A) -.77 
B) -.44 
C) +.22 
D) +.66

Question 6

When a distribution of scores includes a few extreme scores (either extremely high or extremely low) which measure of central tendency is considered to be most accurate?

Accepted Answer

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

Question 7

When a trait is normally distributed, where would you find most of the scores?

Accepted Answer

A) at the bottom of the distribution 
B) at the top of the distribution 
C) near the centre of the distribution 
D) scattered uniformly across the distribution 
A) at the bottom of the distribution 
B) at the top of the distribution 
C) near the centre of the distribution 
D) scattered uniformly across the distribution

Question 8

In gym class, everyone was tested to determine how many sit-ups they could do in one minute. Ming's performance was at the 61st percentile. Which of the following is true?

Accepted Answer

A) Ming did fewer sit-ups than 61 percent of the students in the class. 
B) Ming did 61 sit-ups. 
C) Ming was one standard deviation above the mean. 
D) Ming did more sit-ups than 61 percent of the students in the class. 
A) Ming did fewer sit-ups than 61 percent of the students in the class. 
B) Ming did 61 sit-ups. 
C) Ming was one standard deviation above the mean. 
D) Ming did more sit-ups than 61 percent of the students in the class.

Question 9

Which statistics are used to interpret data and draw conclusions?

Accepted Answer

A) simple 
B) inferential 
C) descriptive 
D) sophisticated 
A) simple 
B) inferential 
C) descriptive 
D) sophisticated

Question 10

What occurs when the distribution of scores in a group of scores is symmetrical?

Accepted Answer

A) The mean, median, and mode are relatively close together in value. 
B) Only the mean and mode are relatively close together in value. 
C) The mean, median, and mode are relatively far apart in value. 
D) Only the median and mode are relatively close together in value. 
A) The mean, median, and mode are relatively close together in value. 
B) Only the mean and mode are relatively close together in value. 
C) The mean, median, and mode are relatively far apart in value. 
D) Only the median and mode are relatively close together in value.

Question 11

What represents the percentage of variation in one variable that can be predicted based on a second variable?

Accepted Answer

A) correlation coefficient 
B) coefficient of determination 
C) coefficient of variability 
D) correlation deviation 
A) correlation coefficient 
B) coefficient of determination 
C) coefficient of variability 
D) correlation deviation

Question 12

The relationship between variable X and variable Y is such that high scores on variable X are generally associated with high scores on variable Y and low scores on variable X are generally associated with low scores on variable Y. What would be found if the correlation coefficient is calculated?

Accepted Answer

A) a strong correlation 
B) a positive correlation 
C) a weak correlation 
D) a negative correlation 
A) a strong correlation 
B) a positive correlation 
C) a weak correlation 
D) a negative correlation

Question 13

SAT scores are normally distributed and have a mean of 500 and a standard deviation of 100. Which range of scores would include approximately 34 percent of all scores?

Accepted Answer

A) 300-400 
B) 400-600 
C) 450-550 
D) 500-600 
A) 300-400 
B) 400-600 
C) 450-550 
D) 500-600

Question 14

Histograms and frequency polygons typically list possible scores on the horizontal axis. What information is recorded on the vertical axis?

Accepted Answer

A) standard deviation of scores 
B) category of scores 
C) frequency of scores 
D) mean of scores 
A) standard deviation of scores 
B) category of scores 
C) frequency of scores 
D) mean of scores

Question 15

Which of the following pairs includes techniques used to graphically represent the frequency of scores in a set of data?

Accepted Answer

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

Question 16

What is the mode of the following set of scores: 1, 2, 5, 6, 6?

Accepted Answer

A) 2 
B) 4 
C) 5 
D) 6 
A) 2 
B) 4 
C) 5 
D) 6

Question 17

Which statement best describes a skewed distribution?

Accepted Answer

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

Question 18

What is a scatter diagram?

Accepted Answer

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

Question 19

What indicates the direction of a correlation?

Accepted Answer

A) a positive or negative sign 
B) the magnitude of the correlation coefficient 
C) the standard deviation of the correlation coefficient 
D) the number of decimal places 
A) a positive or negative sign 
B) the magnitude of the correlation coefficient 
C) the standard deviation of the correlation coefficient 
D) the number of decimal places

Question 20

When your professor gives back an exam, the professor tells the class that the mean score was an 81. You received an 88. If you would like more information to be able to compare your grade to the grades of your classmates, which statistic would be most useful?

Accepted Answer

A) standard deviation 
B) mode 
C) median 
D) percentile of the mean score 
A) standard deviation 
B) mode 
C) median 
D) percentile of the mean score

Exam 17: Appendix B: Statistical Methods

One use of statistics is to organize and summarize data. Which statistics are used for this purpose?

Which statistical concept refers to how much the scores in a distribution tend to differ from the mean?

What is the term for the assumption that there is no true relationship between two variables?

What is NOT one of the uses of statistics?

Which correlation coefficient would be illustrated by a scatter diagram with points scattered farthest from the straight line?

When a distribution of scores includes a few extreme scores (either extremely high or extremely low) which measure of central tendency is considered to be most accurate?

When a trait is normally distributed, where would you find most of the scores?

In gym class, everyone was tested to determine how many sit-ups they could do in one minute. Ming's performance was at the 61st percentile. Which of the following is true?

Which statistics are used to interpret data and draw conclusions?

What occurs when the distribution of scores in a group of scores is symmetrical?

What represents the percentage of variation in one variable that can be predicted based on a second variable?

The relationship between variable X and variable Y is such that high scores on variable X are generally associated with high scores on variable Y and low scores on variable X are generally associated with low scores on variable Y. What would be found if the correlation coefficient is calculated?

SAT scores are normally distributed and have a mean of 500 and a standard deviation of 100. Which range of scores would include approximately 34 percent of all scores?

Histograms and frequency polygons typically list possible scores on the horizontal axis. What information is recorded on the vertical axis?

Which of the following pairs includes techniques used to graphically represent the frequency of scores in a set of data?

What is the mode of the following set of scores: 1, 2, 5, 6, 6?

Which statement best describes a skewed distribution?

What is a scatter diagram?

What indicates the direction of a correlation?

When your professor gives back an exam, the professor tells the class that the mean score was an 81. You received an 88. If you would like more information to be able to compare your grade to the grades of your classmates, which statistic would be most useful?

A: The Evolution of Psychology

B: The Evolution of Psychology

A: The Research Enterprise in Psychology

B: The Research Enterprise in Psychology

A:The Biological Bases of Behaviour

B: The Biological Bases of Behaviour

A: Sensation and Perception

B: Sensation and Perception

A: Variations in Consciousness

B: Variations in Consciousness

A: Learning

B: Learning

A: Human Memory

B: Human Memory

A: Language and Thought

B: Language and Thought

A: Intelligence and Psychological Testing

B: Intelligence and Psychological Testing

A: Motivation and Emotion

B: Motivation and Emotion

A: Human Development Across the Life Span

B: Human Development Across the Life Span

A: Personality: Theory, Research, and Assessment

B: Personality: Theory, Research, and Assessment

A: Stress, Coping, and Health

B: Stress, Coping, and Health

A: Psychological Disorders

B: Psychological Disorders

A: Treatment of Psychological Disorders

B: Treatment of Psychological Disorders

A: Social Behaviour

B: Social Behaviour

Appendix C: Industrialorganizational Psychology

Appendix D: Evaluating the Quality of Web-Based Resources

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