Question 1

Which of the following is not an assumption of the Wilcoxon rank-sum test?

Accepted Answer

A) The data are ratio,interval,or ordinal in scale-all of which must be converted to ranked (ordinal)data before conducting the test. 
B) The underlying distribution is not normal. 
C) The observations are independent. 
D) There is homogeneity of variance. 
A) The data are ratio,interval,or ordinal in scale-all of which must be converted to ranked (ordinal)data before conducting the test. 
B) The underlying distribution is not normal. 
C) The observations are independent. 
D) There is homogeneity of variance. D

Question 2

If a correlated-groups t-test and an independent-groups t-test both have df=16,which experiment used more participants?

Accepted Answer

A) they both used the same number of participants (n=18) 
B) they both used the same number of participants (n=17) 
C) the correlated-groups t-test 
D) the independent-groups t-test 
A) they both used the same number of participants (n=18) 
B) they both used the same number of participants (n=17) 
C) the correlated-groups t-test 
D) the independent-groups t-test D

Question 3

One advantage of the correlated-groups t-test over the independent-groups t-test is that it reduces the error variance due to

Accepted Answer

A) the degrees of freedom. 
B) the independent variable. 
C) the dependent variable. 
D) individual differences. 
A) the degrees of freedom. 
B) the independent variable. 
C) the dependent variable. 
D) individual differences. D

Question 4

For a correlated-groups t-test,the alternative hypothesis states that

Accepted Answer

A) H0: $\mu$1-$\mu$2 = 0. 
B) H0: $\mu$1-$\mu$2 > 0. 
C) Ha: $\mu$1-$\mu$2 = 0. 
D) Ha: $\mu$1-$\mu$2 > 0. 
A) H0: $\mu$1-$\mu$2 = 0. 
B) H0: $\mu$1-$\mu$2 > 0. 
C) Ha: $\mu$1-$\mu$2 = 0. 
D) Ha: $\mu$1-$\mu$2 > 0.

Question 5

Nonparametric is to parametric as _____ is to _____.

Accepted Answer

A) t-test; z-test 
B) z-test; t-test 
C) $\chi$2-test; t-test 
D) t-test; $\chi$2-test 
A) t-test; z-test 
B) z-test; t-test 
C) $\chi$2-test; t-test 
D) t-test; $\chi$2-test

Question 6

If,after calculating an independent-groups t-test you find that it is equal to zero,then

Accepted Answer

A) the two sample means differ significantly. 
B) the two sample means do not differ significantly. 
C) you have done something wrong. 
D) the two population means differ significantly. 
A) the two sample means differ significantly. 
B) the two sample means do not differ significantly. 
C) you have done something wrong. 
D) the two population means differ significantly.

Question 7

Chi-square tests are to _____ data as Wilcoxon tests are to _____ data.

Accepted Answer

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

Question 8

The _____ is a nonparametric inferential test for comparing sample medians of two independent groups of scores.

Accepted Answer

A) Wilcoxon matched-pairs signed-ranks T test 
B) Wilcoxon rank-sum test 
C) $\chi$2 test for independence 
D) $\chi$2 goodness-of-fit test 
A) Wilcoxon matched-pairs signed-ranks T test 
B) Wilcoxon rank-sum test 
C) $\chi$2 test for independence 
D) $\chi$2 goodness-of-fit test

Question 9

When using the Wilcoxon tests,the obtained value must be ______ the critical value in order to establish statistical significance.

Accepted Answer

A) less than or equal to 
B) greater than or equal to 
C) greater than 
D) equal to 
A) less than or equal to 
B) greater than or equal to 
C) greater than 
D) equal to

Question 10

For a correlated-groups t-test,the null hypothesis states that

Accepted Answer

A) H0: $\mu$1-$\mu$2 = 0. 
B) H0: $\mu$1-$\mu$2 > 0. 
C) Ha: $\mu$1-$\mu$2 = 0. 
D) Ha: $\mu$1-$\mu$2 > 0. 
A) H0: $\mu$1-$\mu$2 = 0. 
B) H0: $\mu$1-$\mu$2 > 0. 
C) Ha: $\mu$1-$\mu$2 = 0. 
D) Ha: $\mu$1-$\mu$2 > 0.

Question 11

What are the assumptions of the Wilcoxon rank-sum test?

Accepted Answer

The data are ratio,interval,or ordinal i

Question 12

If researchers reported that,for a correlated-groups design,t(20)= 3.57,p<.05,you can conclude that

Accepted Answer

A) the null hypothesis should be rejected. 
B) that you should fail to reject the null hypothesis. 
C) the alternative hypothesis was incorrect. 
D) the study needs to be repeated. 
A) the null hypothesis should be rejected. 
B) that you should fail to reject the null hypothesis. 
C) the alternative hypothesis was incorrect. 
D) the study needs to be repeated.

Question 13

Wilcoxon rank-sum test is to _____ as Wilcoxon matched-pairs signed-ranks T test is to _____.

Accepted Answer

A) ordinal data; nominal data 
B) interval data,ordinal data 
C) between-subject design; within-subjects design 
D) within-subjects design; between-subjects design 
A) ordinal data; nominal data 
B) interval data,ordinal data 
C) between-subject design; within-subjects design 
D) within-subjects design; between-subjects design

Question 14

Which of the following are aspects of a study that can increase power?

Accepted Answer

A) greater differences produced by the independent variable 
B) smaller variability of raw scores in each condition 
C) increased sample size 
D) all of the options are correct 
A) greater differences produced by the independent variable 
B) smaller variability of raw scores in each condition 
C) increased sample size 
D) all of the options are correct

Question 15

Chi-square is calculated by summing the [(_____ -_____)2 divided by _____].

Accepted Answer

A) observed; expected; observed 
B) expected; observed; observed 
C) observed; expected; expected 
D) observed; observed; expected 
A) observed; expected; observed 
B) expected; observed; observed 
C) observed; expected; expected 
D) observed; observed; expected

Question 16

The $\chi$2 test of independence is used with _____ data.

Accepted Answer

A) continuous 
B) categorical 
C) ordinal 
D) quantitative 
A) continuous 
B) categorical 
C) ordinal 
D) quantitative

Question 17

The null hypothesis for a two-tailed independent-groups t-test states that

Accepted Answer

A) H0: $\mu$1 $\neq$ $\mu$2. 
B) H0:$\mu$1 = $\mu$2. 
C) Ha: $\mu$1 $\neq$ $\mu$2. 
D) Ha: $\mu$1 = $\mu$2. 
A) H0: $\mu$1 $\neq$ $\mu$2. 
B) H0:$\mu$1 = $\mu$2. 
C) Ha: $\mu$1 $\neq$ $\mu$2. 
D) Ha: $\mu$1 = $\mu$2.

Question 18

Which of the following is not an assumption of the Wilcoxon matched-pairs signed-ranks T test?

Accepted Answer

A) The data are ratio,interval or ordinal in scale,all of which must be converted to ranked (ordinal)data before conducting the test. 
B) The underlying distribution is not normal. 
C) The observations are independent. 
D) The other alternatives are all assumptions of the Wilcoxon matched-pairs signed-ranks test. 
A) The data are ratio,interval or ordinal in scale,all of which must be converted to ranked (ordinal)data before conducting the test. 
B) The underlying distribution is not normal. 
C) The observations are independent. 
D) The other alternatives are all assumptions of the Wilcoxon matched-pairs signed-ranks test.

Question 19

If researchers reported that,for a correlated-groups design,t(20)= 3.57,p<.05,you can conclude that

Accepted Answer

A) a total of 21 people participated in the study. 
B) a total of 22 people participated in the study. 
C) a total of 40 people participated in the study. 
D) the number of participants cannot be determined. 
A) a total of 21 people participated in the study. 
B) a total of 22 people participated in the study. 
C) a total of 40 people participated in the study. 
D) the number of participants cannot be determined.

Question 20

When using an independent-groups t-test,the difference between the means is divided by the standard error of the

Accepted Answer

A) mean. 
B) standard deviation. 
C) difference between means. 
D) difference between standard deviations. 
A) mean. 
B) standard deviation. 
C) difference between means. 
D) difference between standard deviations.

Which of the following is not an assumption of the Wilcoxon rank-sum test?

If a correlated-groups t-test and an independent-groups t-test both have df=16,which experiment used more participants?

One advantage of the correlated-groups t-test over the independent-groups t-test is that it reduces the error variance due to

For a correlated-groups t-test,the alternative hypothesis states that

Nonparametric is to parametric as _ is to _.

If,after calculating an independent-groups t-test you find that it is equal to zero,then

Chi-square tests are to _ data as Wilcoxon tests are to _ data.

The _____ is a nonparametric inferential test for comparing sample medians of two independent groups of scores.

When using the Wilcoxon tests,the obtained value must be ______ the critical value in order to establish statistical significance.

For a correlated-groups t-test,the null hypothesis states that

What are the assumptions of the Wilcoxon rank-sum test?

If researchers reported that,for a correlated-groups design,t(20)= 3.57,p<.05,you can conclude that

Wilcoxon rank-sum test is to _ as Wilcoxon matched-pairs signed-ranks T test is to _.

Which of the following are aspects of a study that can increase power?

Chi-square is calculated by summing the [(___ -_)² divided by ___].

The $\chi$ ² test of independence is used with _____ data.

The null hypothesis for a two-tailed independent-groups t-test states that

Which of the following is not an assumption of the Wilcoxon matched-pairs signed-ranks T test?

If researchers reported that,for a correlated-groups design,t(20)= 3.57,p<.05,you can conclude that

When using an independent-groups t-test,the difference between the means is divided by the standard error of the

Thinking Like a Scientist

Getting Started: Ideas, resources, and Ethics

Defining, measuring, and Manipulating Variables

Descriptive Methods

Data Organization and Descriptive Statistics

Correlational Methods and Statistics

Probability and Hypothesis Testing

Introduction to Inferential Statistics

The Logic of Experimental Design

Experimental Designs With More Than Two Levels of an Independent Variable

Complex Experimental Design

Quasi-Experimental and Single-Case Designs

Apa Communication Guidelines

Filters

Exam 10: Inferential Statistics: Two-Group Designs

Which of the following is not an assumption of the Wilcoxon rank-sum test?

If a correlated-groups t-test and an independent-groups t-test both have df=16,which experiment used more participants?

One advantage of the correlated-groups t-test over the independent-groups t-test is that it reduces the error variance due to

For a correlated-groups t-test,the alternative hypothesis states that

Nonparametric is to parametric as _____ is to _____.

If,after calculating an independent-groups t-test you find that it is equal to zero,then

Chi-square tests are to _____ data as Wilcoxon tests are to _____ data.

The _____ is a nonparametric inferential test for comparing sample medians of two independent groups of scores.

When using the Wilcoxon tests,the obtained value must be ______ the critical value in order to establish statistical significance.

For a correlated-groups t-test,the null hypothesis states that

What are the assumptions of the Wilcoxon rank-sum test?

If researchers reported that,for a correlated-groups design,t(20)= 3.57,p<.05,you can conclude that

Wilcoxon rank-sum test is to _____ as Wilcoxon matched-pairs signed-ranks T test is to _____.

Which of the following are aspects of a study that can increase power?

Chi-square is calculated by summing the [(_____ -_____)2 divided by _____].

The χ\chiχ 2 test of independence is used with _____ data.

The null hypothesis for a two-tailed independent-groups t-test states that

Which of the following is not an assumption of the Wilcoxon matched-pairs signed-ranks T test?

If researchers reported that,for a correlated-groups design,t(20)= 3.57,p<.05,you can conclude that

When using an independent-groups t-test,the difference between the means is divided by the standard error of the

Thinking Like a Scientist

Getting Started: Ideas, resources, and Ethics

Defining, measuring, and Manipulating Variables

Descriptive Methods

Data Organization and Descriptive Statistics

Correlational Methods and Statistics

Probability and Hypothesis Testing

Introduction to Inferential Statistics

The Logic of Experimental Design

Experimental Designs With More Than Two Levels of an Independent Variable

Complex Experimental Design

Quasi-Experimental and Single-Case Designs

Apa Communication Guidelines

Filters

Nonparametric is to parametric as _ is to _.

Chi-square tests are to _ data as Wilcoxon tests are to _ data.

Wilcoxon rank-sum test is to _ as Wilcoxon matched-pairs signed-ranks T test is to _.

Chi-square is calculated by summing the [(___ -_)² divided by ___].

The $\chi$ ² test of independence is used with _____ data.