Question 1

When deciding how to make a claim about the effect of a variable,researchers should

Accepted Answer

A)  report the results of significance testing instead of measures of effect size. 
B)  be aware of limitations association with null hypotheses significance testing. 
C)  use the most complicated analysis to tease out the fullest effects. 
D)  not use confidence intervals. 
A)  report the results of significance testing instead of measures of effect size. 
B)  be aware of limitations association with null hypotheses significance testing. 
C)  use the most complicated analysis to tease out the fullest effects. 
D)  not use confidence intervals. B

Question 2

The value of the F-statistic in a single-factor experiment is determined by dividing the Between-Group Mean Square by the

Accepted Answer

A)  Within-Group Mean Square. 
B)  degrees of freedom. 
C)  Between-Group Sum of Squares. 
D)  Total Sum of Squares. 
A)  Within-Group Mean Square. 
B)  degrees of freedom. 
C)  Between-Group Sum of Squares. 
D)  Total Sum of Squares. A

Question 3

Suppose the omnibus analysis of variance for a 2 * 2 complex design reveals only a statistically significant main effect of one independent variable.To understand the effect of this variable the researcher should

Accepted Answer

A)  compute simple main effects analyses. 
B)  use t-tests to compare two means at a time. 
C)  examine the means for the independent variable collapsed across the other independent variable. 
D)  all of these 
A)  compute simple main effects analyses. 
B)  use t-tests to compare two means at a time. 
C)  examine the means for the independent variable collapsed across the other independent variable. 
D)  all of these C

Question 4

The probability we use to define a statistically significant outcome is called

Accepted Answer

A)  an effect size. 
B)  the null hypothesis. 
C)  alpha. 
D)  a margin of error. 
A)  an effect size. 
B)  the null hypothesis. 
C)  alpha. 
D)  a margin of error.

Question 5

Explain the difference between experimental sensitivity and statistical power and identify factors that influence each.

Accepted Answer

Sensitivity refers to the likelihood tha

Question 6

The most common error associated with null hypothesis testing in psychological research is

Accepted Answer

A)  a Type I error. 
B)  a Type II error. 
C)  random sampling. 
D)  too much power. 
A)  a Type I error. 
B)  a Type II error. 
C)  random sampling. 
D)  too much power.

Question 7

If a researcher were to use a .01 level of significance rather than the .05 level,the probability of a Type II error would

Accepted Answer

A)  not change. 
B)  decrease. 
C)  increase. 
D)  not able to tell without more information. 
A)  not change. 
B)  decrease. 
C)  increase. 
D)  not able to tell without more information.

Question 8

The F-test provides a statistic that represents the ratio of between-group variation in the data to

Accepted Answer

A)  sample size. 
B)  within-group variation. 
C)  total variation in the data. 
D)  degrees of freedom. 
A)  sample size. 
B)  within-group variation. 
C)  total variation in the data. 
D)  degrees of freedom.

Question 9

Read the following research report and answer the question that follow.
A researcher compares men's and women's attitudes toward dating their best friend's former girl/boy friend.Specifically,college students are asked to read a story describing a situation in which their best friend breaks up with a partner and they later have an opportunity to date their best friend's former partner.Men and women rate the likelihood they would choose to date their best friend's former partner using a 10-point scale (0 = not at all likely and 9 = completely likely).In addition,participants rate the extent to which a similar situation has occurred to them using a 10-point scale (0 = not at all and 9 = completely).The mean ratings for each question for the two groups,men and women,are presented below:  
 The square root of 28 (the df)is approximately 5.3.What is Cohen's d for the difference between ratings for men and women for the question regarding the likelihood of dating? According to Cohen's criteria,how would you describe this effect?

Accepted Answer

The formula for computing d ba

Question 10

Null hypothesis significance testing is used to compare two means in an independent groups design.
(a)What is the null hypothesis? 
(b)What is required to "reject" the null hypothesis?

Accepted Answer

(a)The null hypothesis when two means ar

Question 11

Following an omnibus F-test,a researcher may learn about specific sources of systematic variation in a single-factor independent groups experiment by performing

Accepted Answer

A)  comparisons of two means. 
B)  repeated measures t-tests. 
C)  correlation coefficients. 
D)  simple main effects. 
A)  comparisons of two means. 
B)  repeated measures t-tests. 
C)  correlation coefficients. 
D)  simple main effects.

Question 12

Two measures of effect size for an independent groups design with more than two means are

Accepted Answer

A)  the t-test and the F-test. 
B)  Cohen's d and the F-test. 
C)  eta-squared and Cohen's f. 
D)  F squared and rho. 
A)  the t-test and the F-test. 
B)  Cohen's d and the F-test. 
C)  eta-squared and Cohen's f. 
D)  F squared and rho.

Question 13

When our results are "statistically significant" we know

Accepted Answer

A)  the independent variable likely produced an effect on the dependent variable. 
B)  the direction of the effect of the independent variable. 
C)  the effect size between the independent and dependent variables is large. 
D)  all of these 
A)  the independent variable likely produced an effect on the dependent variable. 
B)  the direction of the effect of the independent variable. 
C)  the effect size between the independent and dependent variables is large. 
D)  all of these

Question 14

If a researcher were to use a .01 level of significance rather than the .05 level,the probability of a Type I error would

Accepted Answer

A)  not change. 
B)  decrease. 
C)  increase. 
D)  not able to tell without more information. 
A)  not change. 
B)  decrease. 
C)  increase. 
D)  not able to tell without more information.

Question 15

When reporting the results of a complex design experiment,which of the following should not be included?

Accepted Answer

A)  summary statistics for cells in the design in the text, a table, or a figure 
B)  results for omnibus F-test, with exact probabilities 
C)  verbal description of any statistically significant interaction effects 
D)  each subject's score for each dependent variable 
A)  summary statistics for cells in the design in the text, a table, or a figure 
B)  results for omnibus F-test, with exact probabilities 
C)  verbal description of any statistically significant interaction effects 
D)  each subject's score for each dependent variable

Question 16

Read the following research report and answer the question that follow.
A researcher compares men's and women's attitudes toward dating their best friend's former girl/boy friend.Specifically,college students are asked to read a story describing a situation in which their best friend breaks up with a partner and they later have an opportunity to date their best friend's former partner.Men and women rate the likelihood they would choose to date their best friend's former partner using a 10-point scale (0 = not at all likely and 9 = completely likely).In addition,participants rate the extent to which a similar situation has occurred to them using a 10-point scale (0 = not at all and 9 = completely).The mean ratings for each question for the two groups,men and women,are presented below:   What do the p values associated with each t-test tell you besides whether the result is statistically significant?

Accepted Answer

The smaller the p value the greater the

Question 17

The null hypothesis is the assumption that the independent variable

Accepted Answer

A)  did not have an effect. 
B)  had an effect. 
C)  is a relevant variable. 
D)  is statistically significant. 
A)  did not have an effect. 
B)  had an effect. 
C)  is a relevant variable. 
D)  is statistically significant.

Question 18

The most frequently used inferential statistics test when comparing more than two means is

Accepted Answer

A)  analysis of variance (ANOV
A) . 
B)  repeated measures t. 
C)  t-test for independent groups. 
D)  correlation coefficient, r. 
A)  analysis of variance (ANOV
A) . 
B)  repeated measures t. 
C)  t-test for independent groups. 
D)  correlation coefficient, r.

Question 19

A researcher tested a treatment and a control group in an experiment with 15 subjects in each group.Although a t-test indicated the means for the dependent variable were not statistically different,the effect size for the independent variable was .50.A power analysis revealed that the power of the study was .26.This means that

Accepted Answer

A)  the difference between means in the experiment was .26. 
B)  the value of the t-statistic is 0.13 (.50 * .26). 
C)  a statistically significant outcome would be obtained in approximately 1 in 4 attempts with this sample size and effect size. 
D)  the probability of obtaining a statistically significant difference for this experiment is .74 (1 - .26). 
A)  the difference between means in the experiment was .26. 
B)  the value of the t-statistic is 0.13 (.50 * .26). 
C)  a statistically significant outcome would be obtained in approximately 1 in 4 attempts with this sample size and effect size. 
D)  the probability of obtaining a statistically significant difference for this experiment is .74 (1 - .26).

Question 20

Use the ANOVA Summary Table to answer the question that follow:   Describe the analysis that should be conducted next.

Accepted Answer

The source of the statistically signific

When deciding how to make a claim about the effect of a variable,researchers should

The value of the F-statistic in a single-factor experiment is determined by dividing the Between-Group Mean Square by the

Suppose the omnibus analysis of variance for a 2 * 2 complex design reveals only a statistically significant main effect of one independent variable.To understand the effect of this variable the researcher should

The probability we use to define a statistically significant outcome is called

Explain the difference between experimental sensitivity and statistical power and identify factors that influence each.

The most common error associated with null hypothesis testing in psychological research is

If a researcher were to use a .01 level of significance rather than the .05 level,the probability of a Type II error would

The F-test provides a statistic that represents the ratio of between-group variation in the data to

Null hypothesis significance testing is used to compare two means in an independent groups design. (a)What is the null hypothesis? (b)What is required to "reject" the null hypothesis?

Following an omnibus F-test,a researcher may learn about specific sources of systematic variation in a single-factor independent groups experiment by performing

Two measures of effect size for an independent groups design with more than two means are

When our results are "statistically significant" we know

If a researcher were to use a .01 level of significance rather than the .05 level,the probability of a Type I error would

When reporting the results of a complex design experiment,which of the following should not be included?

The null hypothesis is the assumption that the independent variable

The most frequently used inferential statistics test when comparing more than two means is

Use the ANOVA Summary Table to answer the question that follow: Describe the analysis that should be conducted next.

Introduction

The Scientific Method

Ethical Issues in the Conduct of Psychological Research

Observation

Survey Research

Independent Groups Designs

Repeated Measures Designs

Complex Designs

Single-Case Research Designs

Quasi-Experimental Designs and Program Evaluation

Data Analysis and Interpretation: Part Idescribing Data, confidence Intervals, correlation

Communication in Psychology

Filters

Exam 12: Data Analysis and Interpretation: Part Iitests of Statistical Significance and the Analysis Story

When deciding how to make a claim about the effect of a variable,researchers should

The value of the F-statistic in a single-factor experiment is determined by dividing the Between-Group Mean Square by the

Suppose the omnibus analysis of variance for a 2 * 2 complex design reveals only a statistically significant main effect of one independent variable.To understand the effect of this variable the researcher should

The probability we use to define a statistically significant outcome is called

Explain the difference between experimental sensitivity and statistical power and identify factors that influence each.

The most common error associated with null hypothesis testing in psychological research is

If a researcher were to use a .01 level of significance rather than the .05 level,the probability of a Type II error would

The F-test provides a statistic that represents the ratio of between-group variation in the data to

Null hypothesis significance testing is used to compare two means in an independent groups design. (a)What is the null hypothesis? (b)What is required to "reject" the null hypothesis?

Following an omnibus F-test,a researcher may learn about specific sources of systematic variation in a single-factor independent groups experiment by performing

Two measures of effect size for an independent groups design with more than two means are

When our results are "statistically significant" we know

If a researcher were to use a .01 level of significance rather than the .05 level,the probability of a Type I error would

When reporting the results of a complex design experiment,which of the following should not be included?

The null hypothesis is the assumption that the independent variable

The most frequently used inferential statistics test when comparing more than two means is

Use the ANOVA Summary Table to answer the question that follow: Describe the analysis that should be conducted next.

Introduction

The Scientific Method

Ethical Issues in the Conduct of Psychological Research

Observation

Survey Research

Independent Groups Designs

Repeated Measures Designs

Complex Designs

Single-Case Research Designs

Quasi-Experimental Designs and Program Evaluation

Data Analysis and Interpretation: Part Idescribing Data, confidence Intervals, correlation

Communication in Psychology

Filters