Question 1

The mean is ____.

Accepted Answer

A)  the difference between the highest and lowest scores 
B)  the arithmetic average 
C)  one-half of the range 
D)  the most frequent score 
A)  the difference between the highest and lowest scores 
B)  the arithmetic average 
C)  one-half of the range 
D)  the most frequent score

Question 2

If an IQ test is constructed to have a mean of 100 and a standard deviation of 16,approximately what percentage of scores falls between 84 and 116?

Accepted Answer

A)  34 percent 
B)  95 percent 
C)  68 percent 
D)  50 percent 
A)  34 percent 
B)  95 percent 
C)  68 percent 
D)  50 percent

Question 3

Which of the following is one of the basic categories of descriptive statistics?

Accepted Answer

A)  measures of central tendency 
B)  inferring causation 
C)  expressing the difference between two group means 
D)  predicting proportions in a population 
A)  measures of central tendency 
B)  inferring causation 
C)  expressing the difference between two group means 
D)  predicting proportions in a population

Question 4

If your research study had more than two experimental/control groups and encompassed more than one independent variable,you would have to use a(n)____ to determine the differences between the groups.

Accepted Answer

A)  chi-squared test 
B)  analysis of variance 
C)  t test 
D)  correlation coefficient 
A)  chi-squared test 
B)  analysis of variance 
C)  t test 
D)  correlation coefficient

Question 5

Jack is a handsome and extremely charming fellow who is currently dating four women,but now must choose one.Alas,Jack is somewhat shallow and eccentric.He has decided to choose the woman whose median cost on a date is the lowest.The dollar amounts of the five dates with each woman are given below. Which of the women should Jack choose?

Accepted Answer

A)  Barbie: 10, 11, 17, 18, and 20. 
B)  Sandy: 20, 40, 70, 111, and 200. 
C)  Anna: 102, 111, 312, 514, and 813. 
D)  Bambi: 4, 8, 12, 13, and 500. 
A)  Barbie: 10, 11, 17, 18, and 20. 
B)  Sandy: 20, 40, 70, 111, and 200. 
C)  Anna: 102, 111, 312, 514, and 813. 
D)  Bambi: 4, 8, 12, 13, and 500.

Question 6

You are conducting a survey of international students studying at your university.Several of the questions on the survey try to determine how much exposure to American culture the student had before coming to the United States.You suspect that the more exposure the student had before arriving here,the fewer problems of adjustment he or she will report.You are looking for a(n)____.

Accepted Answer

A)  hypothesis. 
B)  negative correlation. 
C)  positive correlation. 
D)  independent variable. 
A)  hypothesis. 
B)  negative correlation. 
C)  positive correlation. 
D)  independent variable.

Question 7

Joe has collected data on the number of hours ten-year-olds spend watching television each week.He tells you that the distribution of scores followed a truly normal curve.Which of the following is suggested by Joe's statement?

Accepted Answer

A)  Fifty percent of the scores fall below the mean. 
B)  The mean, median, and mode are all different. 
C)  Sixty percent of the scores fall within one standard deviation above and below the mean. 
D)  Ten percent of the scores fall two standard deviations above the mean. 
A)  Fifty percent of the scores fall below the mean. 
B)  The mean, median, and mode are all different. 
C)  Sixty percent of the scores fall within one standard deviation above and below the mean. 
D)  Ten percent of the scores fall two standard deviations above the mean.

Question 8

Your instructor comes to class with the results of the last quiz.She tells you that the average score was 7 (out of a possible 10)and that the median was 6.These are measures of ____.

Accepted Answer

A)  dispersion 
B)  central tendency 
C)  variance 
D)  range 
A)  dispersion 
B)  central tendency 
C)  variance 
D)  range

Question 9

The most basic use of histograms is to ____.

Accepted Answer

A)  establish that the null hypothesis is true 
B)  determine whether an analysis of variance is needed 
C)  analyze data statistically 
D)  better understand the shape of the data 
A)  establish that the null hypothesis is true 
B)  determine whether an analysis of variance is needed 
C)  analyze data statistically 
D)  better understand the shape of the data

Question 10

Abby,Chrissy,and Kate are teammates playing "Win,Lose,or Draw." They need exactly 10 points to win and must choose who will draw next.They have some statistics on the points each girl gets when she draws: Abby has a mean of 10 points,Chrissy has a median of 10 points,and Kate has a mode of 10 points.Which girl should draw to have the best chance of winning?

Accepted Answer

A)  Abby 
B)  Chrissy 
C)  Kate 
D)  Both Kate and Abby 
A)  Abby 
B)  Chrissy 
C)  Kate 
D)  Both Kate and Abby

Question 11

Which of the following is a characteristic of a normal distribution?

Accepted Answer

A)  The mean and the standard deviation are equal. 
B)  The standard deviation and the variance are equal. 
C)  Fifty percent of the sample is within one standard deviation of the mean. 
D)  The mean, median, and mode are equal. 
A)  The mean and the standard deviation are equal. 
B)  The standard deviation and the variance are equal. 
C)  Fifty percent of the sample is within one standard deviation of the mean. 
D)  The mean, median, and mode are equal.

Question 12

In a memory experiment,Dr.Nall finds that the difference in the mean number of nonsense syllables remembered by Group A vs.Group B is statistically significant at the p < .05 level.This means that ____.

Accepted Answer

A)  there are five chances in a hundred that the difference was due to chance 
B)  an ANOVA (analysis of variance) found an interaction effect 
C)  if the experiment were conducted 100 times, the result would be the same 90 percent of the time 
D)  the standard deviations in the two groups were small 
A)  there are five chances in a hundred that the difference was due to chance 
B)  an ANOVA (analysis of variance) found an interaction effect 
C)  if the experiment were conducted 100 times, the result would be the same 90 percent of the time 
D)  the standard deviations in the two groups were small

Question 13

<st2:personname w:st="on">Professor Goranson studies the relation between adolescents' self-esteem and the number of close friends they report having.After completing her statistical analyses,Professor Goranson finds that as the number of close friendships increased,adolescents' self-esteem rose moderately.Which correlation coefficient did she likely obtain?

Accepted Answer

A)  -0.86 
B)  -0.35 
C)  +0.46 
D)  +0.98 
A)  -0.86 
B)  -0.35 
C)  +0.46 
D)  +0.98

Question 14

What does it mean if the standard deviation of a distribution of quiz grades is 0?

Accepted Answer

A)  An equal number of people received each grade (A, B, C, D, and 
E) . 
B)  The distribution is a normal, bell-shaped curve. 
C)  Everyone in the class received the same grade or score. 
D)  Everyone in the class received a different grade. 
A)  An equal number of people received each grade (A, B, C, D, and 
E) . 
B)  The distribution is a normal, bell-shaped curve. 
C)  Everyone in the class received the same grade or score. 
D)  Everyone in the class received a different grade.

Question 15

In Dr.Dalbey's study,women missed an average of three work days a year because of colds,and men missed an average of five work days because of colds.To see if the difference between these means is statistically significant,Dr.Dalbey should ____.

Accepted Answer

A)  calculate a set of medians 
B)  calculate a correlation coefficient 
C)  conduct a t test 
D)  utilize factor analytic techniques 
A)  calculate a set of medians 
B)  calculate a correlation coefficient 
C)  conduct a t test 
D)  utilize factor analytic techniques

Question 16

Professor Jenrick has just completed an experiment in which he observed how many times a particular color was selected when 100 people were each given a choice of red,green,or blue.He represents the data graphically by constructing three boxes (labeled Red,Green,and Blue)whose heights are proportional to the number of times each color was chosen.Professor Jenrick has constructed a ____ of the data.

Accepted Answer

A)  histogram 
B)  height chart 
C)  central tendency measure 
D)  statistical significance indicator 
A)  histogram 
B)  height chart 
C)  central tendency measure 
D)  statistical significance indicator

Question 17

Edhilvia is studying the relationship between smoking and number of visits to the doctor.After giving a survey to 1,000 people,she finds that the more people smoked,the more times they visited the doctor every year.From these results,Edhilvia can logically conclude that ____.

Accepted Answer

A)  there is a negative correlation between smoking and visiting the doctor 
B)  there is a positive correlation between smoking and visiting the doctor 
C)  smoking causes people to go to the doctor 
D)  her results are invalid since participants were not randomly assigned to groups 
A)  there is a negative correlation between smoking and visiting the doctor 
B)  there is a positive correlation between smoking and visiting the doctor 
C)  smoking causes people to go to the doctor 
D)  her results are invalid since participants were not randomly assigned to groups

Question 18

Alejandra is interested in describing the spread of the scores in her data set.She should calculate the ____ of the data set.

Accepted Answer

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

Question 19

Malcolm discovers that he has made 903 observations for his research study.Which abbreviation would he use to denote the total number of observations made?

Accepted Answer

A)  X 
B)  Y 
C)  SD 
D)  N 
A)  X 
B)  Y 
C)  SD 
D)  N

Question 20

Jebreel is a graduating senior who must decide among four job offers in four different cities.He wants to move to a city where he can wear the same clothes all year.The standard deviations of temperature in these cities are given below.Which city should Jebreel choose?

Accepted Answer

A) 8.19 
B)  12.46 
C)  19.48 
D)  24.13 
A) 8.19 
B)  12.46 
C)  19.48 
D)  24.13

The mean is ____.

If an IQ test is constructed to have a mean of 100 and a standard deviation of 16,approximately what percentage of scores falls between 84 and 116?

Which of the following is one of the basic categories of descriptive statistics?

If your research study had more than two experimental/control groups and encompassed more than one independent variable,you would have to use a(n)____ to determine the differences between the groups.

Joe has collected data on the number of hours ten-year-olds spend watching television each week.He tells you that the distribution of scores followed a truly normal curve.Which of the following is suggested by Joe's statement?

Your instructor comes to class with the results of the last quiz.She tells you that the average score was 7 (out of a possible 10)and that the median was 6.These are measures of ____.

The most basic use of histograms is to ____.

Which of the following is a characteristic of a normal distribution?

In a memory experiment,Dr.Nall finds that the difference in the mean number of nonsense syllables remembered by Group A vs.Group B is statistically significant at the p < .05 level.This means that ____.

What does it mean if the standard deviation of a distribution of quiz grades is 0?

In Dr.Dalbey's study,women missed an average of three work days a year because of colds,and men missed an average of five work days because of colds.To see if the difference between these means is statistically significant,Dr.Dalbey should ____.

Edhilvia is studying the relationship between smoking and number of visits to the doctor.After giving a survey to 1,000 people,she finds that the more people smoked,the more times they visited the doctor every year.From these results,Edhilvia can logically conclude that ____.

Alejandra is interested in describing the spread of the scores in her data set.She should calculate the ____ of the data set.

Malcolm discovers that he has made 903 observations for his research study.Which abbreviation would he use to denote the total number of observations made?

Jebreel is a graduating senior who must decide among four job offers in four different cities.He wants to move to a city where he can wear the same clothes all year.The standard deviations of temperature in these cities are given below.Which city should Jebreel choose?

Introduction to the Science of Psychology

Research in Psychology

Biological Aspects of Psychology

Sensation and Perception

Learning

Memory

Thought and Language

Intelligence

Consciousness

Motivation and Emotion

Human Development

Health, stress, and Coping

Personality

Psychological Disorders

Treatment of Psychological Disorders

Social Psychology

Industrial and Organizational Psychology

Neuropsychology

Appendix A: Statistics in Psychological Research

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Exam 20: Appendix B: Behavioral Genetics.

The mean is ____.

If an IQ test is constructed to have a mean of 100 and a standard deviation of 16,approximately what percentage of scores falls between 84 and 116?

Which of the following is one of the basic categories of descriptive statistics?

If your research study had more than two experimental/control groups and encompassed more than one independent variable,you would have to use a(n)____ to determine the differences between the groups.

Joe has collected data on the number of hours ten-year-olds spend watching television each week.He tells you that the distribution of scores followed a truly normal curve.Which of the following is suggested by Joe's statement?

Your instructor comes to class with the results of the last quiz.She tells you that the average score was 7 (out of a possible 10)and that the median was 6.These are measures of ____.

The most basic use of histograms is to ____.

Which of the following is a characteristic of a normal distribution?

In a memory experiment,Dr.Nall finds that the difference in the mean number of nonsense syllables remembered by Group A vs.Group B is statistically significant at the p < .05 level.This means that ____.

What does it mean if the standard deviation of a distribution of quiz grades is 0?

In Dr.Dalbey's study,women missed an average of three work days a year because of colds,and men missed an average of five work days because of colds.To see if the difference between these means is statistically significant,Dr.Dalbey should ____.

Edhilvia is studying the relationship between smoking and number of visits to the doctor.After giving a survey to 1,000 people,she finds that the more people smoked,the more times they visited the doctor every year.From these results,Edhilvia can logically conclude that ____.

Alejandra is interested in describing the spread of the scores in her data set.She should calculate the ____ of the data set.

Malcolm discovers that he has made 903 observations for his research study.Which abbreviation would he use to denote the total number of observations made?

Jebreel is a graduating senior who must decide among four job offers in four different cities.He wants to move to a city where he can wear the same clothes all year.The standard deviations of temperature in these cities are given below.Which city should Jebreel choose?

Introduction to the Science of Psychology

Research in Psychology

Biological Aspects of Psychology

Sensation and Perception

Learning

Memory

Thought and Language

Intelligence

Consciousness

Motivation and Emotion

Human Development

Health, stress, and Coping

Personality

Psychological Disorders

Treatment of Psychological Disorders

Social Psychology

Industrial and Organizational Psychology

Neuropsychology

Appendix A: Statistics in Psychological Research

Filters