Question 1

How spread out the scores are refers to

Accepted Answer

A)  variability. 
B)  central tendency 
C)  a Type I error. 
D)  a Type II error. 
A)  variability. 
B)  central tendency 
C)  a Type I error. 
D)  a Type II error.

Question 2

Consider the following ratio-level scores: 1, 2, 3, 4, 24. What is the best choice for central tendency?

Accepted Answer

A)  Mode 
B)  Median 
C)  Mean 
D)  Variance 
A)  Mode 
B)  Median 
C)  Mean 
D)  Variance

Question 3

What does a large number for variance mean?

Accepted Answer

A)  The scores tend to be clustered together. 
B)  The scores tend to be spread out. 
C)  The distribution must be bimodal. 
D)  The distribution must be normal. 
A)  The scores tend to be clustered together. 
B)  The scores tend to be spread out. 
C)  The distribution must be bimodal. 
D)  The distribution must be normal.

Question 4

The assignment of symbols to events according to a set of rules is known as

Accepted Answer

A)  statistics. 
B)  a Type I error. 
C)  a Type II error. 
D)  measurement. 
A)  statistics. 
B)  a Type I error. 
C)  a Type II error. 
D)  measurement.

Question 5

What does a ".05 level of significance" mean?

Accepted Answer

A)  A result is considered significant if it would occur 5 (or fewer) times out of 100 when the null hypothesis is true. 
B)  There is a 5% chance that the null hypothesis is true. 
C)  There is a 5% chance of proving your results. 
D)  There is a 5% chance of making a Type II error. 
A)  A result is considered significant if it would occur 5 (or fewer) times out of 100 when the null hypothesis is true. 
B)  There is a 5% chance that the null hypothesis is true. 
C)  There is a 5% chance of proving your results. 
D)  There is a 5% chance of making a Type II error.

Question 6

Patricia finds that in her study, r2 = 10%. This means that

Accepted Answer

A)  the correlation is positive. 
B)  the correlation is negative. 
C)  90% of the variability in her research results can be accounted for by other variables. 
D)  the effect size is large. 
A)  the correlation is positive. 
B)  the correlation is negative. 
C)  90% of the variability in her research results can be accounted for by other variables. 
D)  the effect size is large.

Question 7

The __________ is the arithmetic average.

Accepted Answer

A)  mode 
B)  mean 
C)  median 
D)  standard deviation 
A)  mode 
B)  mean 
C)  median 
D)  standard deviation

Question 8

Eileen calculates an effect size of d = .45 for her study. According to Cohen (1977), this is considered a ________ effect size.

Accepted Answer

A)  small 
B)  medium 
C)  large 
D)  extra-large 
A)  small 
B)  medium 
C)  large 
D)  extra-large

Question 9

For an experiment, the IV is plotted on the ________ and the DV is plotted on the ________.

Accepted Answer

A)  ordinate; y axis 
B)  abscissa; ordinate 
C)  x axis; abscissa 
D)  ordinate; abscissa 
A)  ordinate; y axis 
B)  abscissa; ordinate 
C)  x axis; abscissa 
D)  ordinate; abscissa

Question 10

Define "statistics." What is the difference between descriptive and inferential statistics?

Accepted Answer

Statistics is a branch of mathematics de

Question 11

"Rachel made half as many mistakes as Erin." This statement represents a(n) __________ level of measurement.

Accepted Answer

A)  ordinal 
B)  interval 
C)  ratio 
D)  nominal 
A)  ordinal 
B)  interval 
C)  ratio 
D)  nominal

Question 12

How many levels does this independent variable have?

Accepted Answer

The answer of How many levels does this independent variable...

Question 13

What is a t test? Give an example of an experiment in which you would use a t test.

Accepted Answer

A t test is a statistical test used to d

Question 14

If we place a dot in the middle of each bar in a histogram, connect the dots, and remove the bars, we have created a

Accepted Answer

A)  line graph. 
B)  bar graph. 
C)  frequency polygon. 
D)  pie chart. 
A)  line graph. 
B)  bar graph. 
C)  frequency polygon. 
D)  pie chart.

Question 15

Consider the following scores: 1, 2, 3, 3, 11. What is the mode?

Accepted Answer

A)  3 
B)  4 
C)  11 
D)  20 
A)  3 
B)  4 
C)  11 
D)  20

Question 16

A histogram can be used for _________ categories.

Accepted Answer

A)  quantitative 
B)  qualitative 
C)  quantitative or qualitative 
D)  neither quantitative nor qualitative 
A)  quantitative 
B)  qualitative 
C)  quantitative or qualitative 
D)  neither quantitative nor qualitative

Question 17

Which of the following is a property of the ratio scale of measurement?

Accepted Answer

A)  true zero point 
B)  equal intervals between scores 
C)  scores are rank ordered 
D)  All of the above. 
A)  true zero point 
B)  equal intervals between scores 
C)  scores are rank ordered 
D)  All of the above.

Question 18

________ is a statistical measure that conveys information about the magnitude of the effect produced by the independent variable.

Accepted Answer

A)  A t test 
B)  Pearson's product-moment correlation coefficient 
C)  Standard deviation 
D)  Effect size 
A)  A t test 
B)  Pearson's product-moment correlation coefficient 
C)  Standard deviation 
D)  Effect size

Question 19

Consider the following scores: 1, 2, 2, 2, 3, 3, 4, 4, 6, 7, 8, 10. What is the range?

Accepted Answer

A)  2 
B)  9 
C)  10 
D)  4.5 
A)  2 
B)  9 
C)  10 
D)  4.5

Question 20

A graph in which the frequency for each category of a quantitative variable is represented as a vertical column that touches the adjacent column is called a

Accepted Answer

A)  bar graph. 
B)  frequency polygon. 
C)  histogram. 
D)  pie chart. 
A)  bar graph. 
B)  frequency polygon. 
C)  histogram. 
D)  pie chart.

How spread out the scores are refers to

Consider the following ratio-level scores: 1, 2, 3, 4, 24. What is the best choice for central tendency?

What does a large number for variance mean?

The assignment of symbols to events according to a set of rules is known as

What does a ".05 level of significance" mean?

Patricia finds that in her study, r2 = 10%. This means that

The __________ is the arithmetic average.

Eileen calculates an effect size of d = .45 for her study. According to Cohen (1977), this is considered a ________ effect size.

For an experiment, the IV is plotted on the and the DV is plotted on the .

Define "statistics." What is the difference between descriptive and inferential statistics?

"Rachel made half as many mistakes as Erin." This statement represents a(n) __________ level of measurement.

How many levels does this independent variable have?

What is a t test? Give an example of an experiment in which you would use a t test.

If we place a dot in the middle of each bar in a histogram, connect the dots, and remove the bars, we have created a

Consider the following scores: 1, 2, 3, 3, 11. What is the mode?

A histogram can be used for _________ categories.

Which of the following is a property of the ratio scale of measurement?

________ is a statistical measure that conveys information about the magnitude of the effect produced by the independent variable.

Consider the following scores: 1, 2, 2, 2, 3, 3, 4, 4, 6, 7, 8, 10. What is the range?

A graph in which the frequency for each category of a quantitative variable is represented as a vertical column that touches the adjacent column is called a

Psychological Research and the Research Methods Course

Developing a Good Research Idea and Conducting an Ethical Project

Qualitative Research Methods

Nonexperimental Methods: Descriptive Methods, Correlational Studies, Ex Post Facto Studies, Surveys and Questionnaires, Sampling, and Basic Research Strategies

Using the Scientific Method in Psychology

Conducting a Good Experiment I: Variables and Control

Conducting a Good Experiment Ii: Final Considerations, Unanticipated Influences, and Cross-Cultural Issues

Internal and External Validity

Designing, Conducting, Analyzing, and Interpreting Experiments With Two Groups

Designing, Conducting, Analyzing, and Interpreting Experiments With More Than Two Groups

Designing, Conducting, Analyzing, and Interpreting Experiments With Multiple Independent Variables

Alternative Research Designs

Writing and Assembling an Apa-Format Research Report

Filters

Exam 9: Using Statistics to Answer Questions

How spread out the scores are refers to

Consider the following ratio-level scores: 1, 2, 3, 4, 24. What is the best choice for central tendency?

What does a large number for variance mean?

The assignment of symbols to events according to a set of rules is known as

What does a ".05 level of significance" mean?

Patricia finds that in her study, r2 = 10%. This means that

The __________ is the arithmetic average.

Eileen calculates an effect size of d = .45 for her study. According to Cohen (1977), this is considered a ________ effect size.

For an experiment, the IV is plotted on the ________ and the DV is plotted on the ________.

Define "statistics." What is the difference between descriptive and inferential statistics?

"Rachel made half as many mistakes as Erin." This statement represents a(n) __________ level of measurement.

How many levels does this independent variable have?

What is a t test? Give an example of an experiment in which you would use a t test.

If we place a dot in the middle of each bar in a histogram, connect the dots, and remove the bars, we have created a

Consider the following scores: 1, 2, 3, 3, 11. What is the mode?

A histogram can be used for _________ categories.

Which of the following is a property of the ratio scale of measurement?

________ is a statistical measure that conveys information about the magnitude of the effect produced by the independent variable.

Consider the following scores: 1, 2, 2, 2, 3, 3, 4, 4, 6, 7, 8, 10. What is the range?

A graph in which the frequency for each category of a quantitative variable is represented as a vertical column that touches the adjacent column is called a

Psychological Research and the Research Methods Course

Developing a Good Research Idea and Conducting an Ethical Project

Qualitative Research Methods

Nonexperimental Methods: Descriptive Methods, Correlational Studies, Ex Post Facto Studies, Surveys and Questionnaires, Sampling, and Basic Research Strategies

Using the Scientific Method in Psychology

Conducting a Good Experiment I: Variables and Control

Conducting a Good Experiment Ii: Final Considerations, Unanticipated Influences, and Cross-Cultural Issues

Internal and External Validity

Designing, Conducting, Analyzing, and Interpreting Experiments With Two Groups

Designing, Conducting, Analyzing, and Interpreting Experiments With More Than Two Groups

Designing, Conducting, Analyzing, and Interpreting Experiments With Multiple Independent Variables

Alternative Research Designs

Writing and Assembling an Apa-Format Research Report

Filters

For an experiment, the IV is plotted on the and the DV is plotted on the .