Question 1

The Spearman correlation can be performed to examine the relation between two ordinal variables.

Accepted Answer

A) True 
 B)False

Question 2

If one rejects the null hypothesis when using the Kruskal-Wallis H test, then:

Accepted Answer

A)  all the groups differ significantly from one another. 
B)  at least one of the groups differs significantly from another, but you do not know which one. 
C)  the group ranks are similar. 
D)  the largest difference between a ranked pair is at least two times the smallest difference. 
A)  all the groups differ significantly from one another. 
B)  at least one of the groups differs significantly from another, but you do not know which one. 
C)  the group ranks are similar. 
D)  the largest difference between a ranked pair is at least two times the smallest difference.

Question 3

Bootstrapping is used on a sample of data with the following values: 520, 515, 480, 420, 610, 470, 420, and 630.Each sample collected during the bootstrapping process must have how many scores?

Accepted Answer

A)  2 
B)  4 
C)  5 
D)  8 
A)  2 
B)  4 
C)  5 
D)  8

Question 4

The Kruskal-Wallis H test is the nonparametric equivalent of the two-way within-groups ANOVA.

Accepted Answer

A) True 
 B)False

Question 5

The test statistic H for the Kruskal-Wallis test is compared to a cutoff value based on a _____ distribution.

Accepted Answer

A)  F 
B)  z 
C)  chi-square 
D)  t 
A)  F 
B)  z 
C)  chi-square 
D)  t

Question 6

A census reporter is trying to determine which of six countries has the largest city population, that is, the greatest concentration of population in urban areas.He is using ordinal data for all the cities in each of the countries, ranked from largest to smallest for city population.To compare the countries based on city population he should use a:

Accepted Answer

A)  Kruskal-Wallis H test. 
B)  Mann-Whitney U test. 
C)  Wilcoxon signed-rank test. 
D)  one-way ANOVA. 
A)  Kruskal-Wallis H test. 
B)  Mann-Whitney U test. 
C)  Wilcoxon signed-rank test. 
D)  one-way ANOVA.

Question 7

A researcher wants to examine the relation between class rank and popularity among peers.Class rank is provided by the school and includes each student's rank in order.The researcher assesses popularity using a likability measure that provides scale data.What statistic should be used to assess this relation?

Accepted Answer

A)  chi-square test for goodness-of-fit 
B)  independent-samples t test 
C)  Wilcoxon signed-rank test 
D)  Spearman rank-order correlation coefficient 
A)  chi-square test for goodness-of-fit 
B)  independent-samples t test 
C)  Wilcoxon signed-rank test 
D)  Spearman rank-order correlation coefficient

Question 8

The interpretation of the Spearman correlation coefficient is identical to that for the:

Accepted Answer

A)  independent-samples t test. 
B)  Pearson correlation coefficient. 
C)  chi-square test for independence. 
D)  Mann-Whitney U test. 
A)  independent-samples t test. 
B)  Pearson correlation coefficient. 
C)  chi-square test for independence. 
D)  Mann-Whitney U test.

Question 9

Is there a relationship between rugby players' ability to score a goal and their height? The International Rugby Board is investigating whether there are any differences in the average rankings for number of goals scored by tall and short players in a season.What is the research hypothesis for this Mann-Whitney U test?

Accepted Answer

A)  Tall rugby players and short rugby players do not differ in average scores per season. 
B)  Tall rugby players and short rugby players differ in average scores per season. 
C)  Tall rugby players have a higher number of scores per season than do short rugby players. 
D)  Short rugby players have a higher number of scores per season than do tall rugby players. 
A)  Tall rugby players and short rugby players do not differ in average scores per season. 
B)  Tall rugby players and short rugby players differ in average scores per season. 
C)  Tall rugby players have a higher number of scores per season than do short rugby players. 
D)  Short rugby players have a higher number of scores per season than do tall rugby players.

Question 10

When converting data to ranks, scores of the same value receive the average of the two ranks they would hold if different.

Accepted Answer

A) True 
 B)False

Question 11

Melanie is interested in whether science fiction movies typically get higher star ratings (on a five-star scale) than dramas.What kind of statistical test could be used to address this question?

Accepted Answer

A)  parametric test 
B)  nonparametric test 
C)  correlation 
D)  independent-samples t test 
A)  parametric test 
B)  nonparametric test 
C)  correlation 
D)  independent-samples t test

Question 12

The assumptions of the Kruskal-Wallis H test are that the:

Accepted Answer

A)  data are ordinal and participants are randomly selected. 
B)  data are ordinal, participants are randomly selected, and the population distribution of ranks is symmetric. 
C)  data are scale and participants are randomly selected. 
D)  participants are randomly selected and the population distribution is symmetric. 
A)  data are ordinal and participants are randomly selected. 
B)  data are ordinal, participants are randomly selected, and the population distribution of ranks is symmetric. 
C)  data are scale and participants are randomly selected. 
D)  participants are randomly selected and the population distribution is symmetric.

Question 13

The Kruskal-Wallis H test is the nonparametric equivalent to the one-way between-groups ANOVA.

Accepted Answer

A) True 
 B)False

Question 14

When using bootstrapping to create a confidence interval, what is true about the width of that confidence interval?

Accepted Answer

A)  A wide interval indicates that the estimate is highly accurate. 
B)  A narrow interval results in lower confidence. 
C)  A narrow interval indicates that the estimate for the mean is not very precise. 
D)  A wide interval indicates that the estimate for the mean is not very precise. 
A)  A wide interval indicates that the estimate is highly accurate. 
B)  A narrow interval results in lower confidence. 
C)  A narrow interval indicates that the estimate for the mean is not very precise. 
D)  A wide interval indicates that the estimate for the mean is not very precise.

Question 15

Bootstrapping is used on a sample of data with the following values: 520, 515, 480, 420, 610, 470, 420, and 630.The confidence interval created through bootstrapping will be centered around what value?

Accepted Answer

A)  mean of the original sample 
B)  mean of the distribution of sample means 
C)  zero 
D)  mean of the test 
A)  mean of the original sample 
B)  mean of the distribution of sample means 
C)  zero 
D)  mean of the test

Question 16

Does a person's letter grade in statistics depend on whether he or she is a member of a Greek organization? In three statistics classes, data is collected on the letter grades of students belonging to Greek organizations and of students who are not members.Which technique would be used to analyze the data?

Accepted Answer

A)  independent-samples t test 
B)  paired-samples t test 
C)  Wilcoxon signed-rank test 
D)  Mann-Whitney U test 
A)  independent-samples t test 
B)  paired-samples t test 
C)  Wilcoxon signed-rank test 
D)  Mann-Whitney U test

Question 17

The nonparametric equivalent of the one-way between-groups ANOVA is the:

Accepted Answer

A)  Kruskal-Wallis H test. 
B)  Mann-Whitney U test. 
C)  chi-square. 
D)  Wilcoxon signed-rank test. 
A)  Kruskal-Wallis H test. 
B)  Mann-Whitney U test. 
C)  chi-square. 
D)  Wilcoxon signed-rank test.

Question 18

Bootstrapping involves using limited sample data to represent the entire population through repeated sampling without replacement.

Accepted Answer

A) True 
 B)False

Question 19

The Wilcoxon signed-rank test has three assumptions, including that the differences are normally distributed.

Accepted Answer

A) True 
 B)False

Question 20

When using the Mann-Whitney U test, the null hypothesis is rejected when the _____ of the two calculated statistics is equal to or _____ than the critical value.

Accepted Answer

A)  smaller; greater 
B)  larger; greater 
C)  smaller; less 
D)  larger; less 
A)  smaller; greater 
B)  larger; greater 
C)  smaller; less 
D)  larger; less

The Spearman correlation can be performed to examine the relation between two ordinal variables.

If one rejects the null hypothesis when using the Kruskal-Wallis H test, then:

Bootstrapping is used on a sample of data with the following values: 520, 515, 480, 420, 610, 470, 420, and 630.Each sample collected during the bootstrapping process must have how many scores?

The Kruskal-Wallis H test is the nonparametric equivalent of the two-way within-groups ANOVA.

The test statistic H for the Kruskal-Wallis test is compared to a cutoff value based on a _____ distribution.

The interpretation of the Spearman correlation coefficient is identical to that for the:

When converting data to ranks, scores of the same value receive the average of the two ranks they would hold if different.

Melanie is interested in whether science fiction movies typically get higher star ratings (on a five-star scale) than dramas.What kind of statistical test could be used to address this question?

The assumptions of the Kruskal-Wallis H test are that the:

The Kruskal-Wallis H test is the nonparametric equivalent to the one-way between-groups ANOVA.

When using bootstrapping to create a confidence interval, what is true about the width of that confidence interval?

Bootstrapping is used on a sample of data with the following values: 520, 515, 480, 420, 610, 470, 420, and 630.The confidence interval created through bootstrapping will be centered around what value?

The nonparametric equivalent of the one-way between-groups ANOVA is the:

Bootstrapping involves using limited sample data to represent the entire population through repeated sampling without replacement.

The Wilcoxon signed-rank test has three assumptions, including that the differences are normally distributed.

When using the Mann-Whitney U test, the null hypothesis is rejected when the _ of the two calculated statistics is equal to or _ than the critical value.

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Filters

Exam 18: Choosing and Reporting Statistics

The Spearman correlation can be performed to examine the relation between two ordinal variables.

If one rejects the null hypothesis when using the Kruskal-Wallis H test, then:

Bootstrapping is used on a sample of data with the following values: 520, 515, 480, 420, 610, 470, 420, and 630.Each sample collected during the bootstrapping process must have how many scores?

The Kruskal-Wallis H test is the nonparametric equivalent of the two-way within-groups ANOVA.

The test statistic H for the Kruskal-Wallis test is compared to a cutoff value based on a _____ distribution.

The interpretation of the Spearman correlation coefficient is identical to that for the:

When converting data to ranks, scores of the same value receive the average of the two ranks they would hold if different.

Melanie is interested in whether science fiction movies typically get higher star ratings (on a five-star scale) than dramas.What kind of statistical test could be used to address this question?

The assumptions of the Kruskal-Wallis H test are that the:

The Kruskal-Wallis H test is the nonparametric equivalent to the one-way between-groups ANOVA.

When using bootstrapping to create a confidence interval, what is true about the width of that confidence interval?

Bootstrapping is used on a sample of data with the following values: 520, 515, 480, 420, 610, 470, 420, and 630.The confidence interval created through bootstrapping will be centered around what value?

The nonparametric equivalent of the one-way between-groups ANOVA is the:

Bootstrapping involves using limited sample data to represent the entire population through repeated sampling without replacement.

The Wilcoxon signed-rank test has three assumptions, including that the differences are normally distributed.

When using the Mann-Whitney U test, the null hypothesis is rejected when the _____ of the two calculated statistics is equal to or _____ than the critical value.

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Between-Groups Anova

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Filters

When using the Mann-Whitney U test, the null hypothesis is rejected when the _ of the two calculated statistics is equal to or _ than the critical value.