Question 1

The one-sample runs test is useful to detect nonrandom patterns in time-series data.

Accepted Answer

A) True 
 B)False

Question 2

Which nonparametric test is analogous to a parametric k-sample test for means?

Accepted Answer

A)  Kruskal-Wallis test 
B)  Wilcoxon signed-rank test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Wald-Wolfowitz one-sample runs test 
A)  Kruskal-Wallis test 
B)  Wilcoxon signed-rank test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Wald-Wolfowitz one-sample runs test

Question 3

The one-sample runs test is also called the Wald-Wolfowitz test after its inventors.

Accepted Answer

A) True 
 B)False

Question 4

The Kruskal-Wallis test is a test for randomness in sequential data.

Accepted Answer

A) True 
 B)False

Question 5

Which nonparametric test is analogous to a two-factor ANOVA without replication?

Accepted Answer

A)  Wilcoxon signed-rank test 
B)  Friedman test 
C)  Mann-Whitney test 
D)  Kruskal-Wallis test 
A)  Wilcoxon signed-rank test 
B)  Friedman test 
C)  Mann-Whitney test 
D)  Kruskal-Wallis test

Question 6

The Wilcoxon rank sum test (Mann-Whitney test)requires two independent samples.

Accepted Answer

A) True 
 B)False

Question 7

Parametric tests generally are more powerful than nonparametric tests when normality can be assumed.

Accepted Answer

A) True 
 B)False

Question 8

Attendees at an outdoor concert can buy pavilion tickets (A)or lawn tickets (B).Below is the output for the one-sample runs to test whether there is a pattern in 32 consecutive ticket purchases.   The best conclusion at α = .05 would be:

Accepted Answer

A)  the pattern is random. 
B)  there is a difference in medians. 
C)  the sample sizes are too small. 
D)  the sample sizes must be equal. 
A)  the pattern is random. 
B)  there is a difference in medians. 
C)  the sample sizes are too small. 
D)  the sample sizes must be equal.

Question 9

The Wilcoxon signed-rank test is less powerful than a one-sample test of a mean when the population is actually normal.

Accepted Answer

A) True 
 B)False

Question 10

Twenty customers are randomly chosen and each is given a sample of Nut Butter ice cream to taste.The customers rank the taste of the ice cream on a 10-point scale.Each is then given a sample of Chewy Gooey ice cream to taste and rank on a 10-point scale.Based on the 20 customers' ratings of each flavor,the research analyst conducting the survey wishes to determine if one flavor is preferred over the other.Which nonparametric test would you use to determine if there is a difference in the ratings?

Accepted Answer

A)  Wald-Wolfowitz one-sample runs test 
B)  Wilcoxon signed-rank test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Kruskal-Wallis test 
A)  Wald-Wolfowitz one-sample runs test 
B)  Wilcoxon signed-rank test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Kruskal-Wallis test

Question 11

Spearman's rank correlation coefficient lies within the range 0 to 1.00 inclusive.

Accepted Answer

A) True 
 B)False

Question 12

We sometimes call the Wilcoxon rank sum test the Mann/Whitney test,but the two are the same.

Accepted Answer

A) True 
 B)False

Question 13

Returns on an investor's stock portfolio (n = 19 stocks)are compared for the same stock in each of two consecutive quarters.Since the returns are not normally distributed (normality test p-values were .005 and .126 respectively),a nonparametric test was chosen.The test results are shown below.   Which is the best conclusion?

Accepted Answer

A)  The means are the same at α = .01. 
B)  The medians are the same at α = .01. 
C)  The means differ at α = .01. 
D)  The medians differ at α = .01. 
A)  The means are the same at α = .01. 
B)  The medians are the same at α = .01. 
C)  The means differ at α = .01. 
D)  The medians differ at α = .01.

Question 14

At the Seymour Clinic,the total number of patients seen by three doctors over three days is as follows:   Which nonparametric test would you use to compare the median number of patients seen by the doctors on each day?

Accepted Answer

A)  Wilcoxon test 
B)  Kruskal-Wallis test 
C)  Anderson-Darling test 
D)  Friedman test 
A)  Wilcoxon test 
B)  Kruskal-Wallis test 
C)  Anderson-Darling test 
D)  Friedman test

Question 15

The Kruskal-Wallis test requires c independent samples (where usually c > 2).

Accepted Answer

A) True 
 B)False

Question 16

The Wilcoxon rank sum test (Mann-Whitney test)can be used even if population variances are unequal.

Accepted Answer

A) True 
 B)False

Question 17

Which nonparametric test has no parametric counterpart?

Accepted Answer

A)  Wald-Wolfowitz one-sample runs test 
B)  Spearman rank correlation test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Kruskal-Wallis test 
A)  Wald-Wolfowitz one-sample runs test 
B)  Spearman rank correlation test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Kruskal-Wallis test

Question 18

Delta Air Lines wants to determine if the number of no-shows for flights originating from Detroit are higher than from Minneapolis.A sample of 20 flights from each city is taken and the number of no-shows is determined for each flight.Which nonparametric test would you use to determine whether the number of no-shows is greater in Detroit?

Accepted Answer

A)  Wald-Wolfowitz one-sample runs test 
B)  Wilcoxon signed-rank test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Kruskal-Wallis test 
A)  Wald-Wolfowitz one-sample runs test 
B)  Wilcoxon signed-rank test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Kruskal-Wallis test

Question 19

The Wilcoxon signed-rank test does not assume a normal population,but it does require a roughly symmetric population.

Accepted Answer

A) True 
 B)False

Question 20

The Wilcoxon signed-rank test is robust to outliers in the data if the population is at least somewhat symmetric.

Accepted Answer

A) True 
 B)False

The one-sample runs test is useful to detect nonrandom patterns in time-series data.

Which nonparametric test is analogous to a parametric k-sample test for means?

The one-sample runs test is also called the Wald-Wolfowitz test after its inventors.

The Kruskal-Wallis test is a test for randomness in sequential data.

Which nonparametric test is analogous to a two-factor ANOVA without replication?

The Wilcoxon rank sum test (Mann-Whitney test)requires two independent samples.

Parametric tests generally are more powerful than nonparametric tests when normality can be assumed.

Attendees at an outdoor concert can buy pavilion tickets (A)or lawn tickets (B).Below is the output for the one-sample runs to test whether there is a pattern in 32 consecutive ticket purchases. The best conclusion at α = .05 would be:

The Wilcoxon signed-rank test is less powerful than a one-sample test of a mean when the population is actually normal.

Spearman's rank correlation coefficient lies within the range 0 to 1.00 inclusive.

We sometimes call the Wilcoxon rank sum test the Mann/Whitney test,but the two are the same.

At the Seymour Clinic,the total number of patients seen by three doctors over three days is as follows: Which nonparametric test would you use to compare the median number of patients seen by the doctors on each day?

The Kruskal-Wallis test requires c independent samples (where usually c > 2).

The Wilcoxon rank sum test (Mann-Whitney test)can be used even if population variances are unequal.

Which nonparametric test has no parametric counterpart?

The Wilcoxon signed-rank test does not assume a normal population,but it does require a roughly symmetric population.

The Wilcoxon signed-rank test is robust to outliers in the data if the population is at least somewhat symmetric.

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Quality Management

Filters

Exam 16: Nonparametric Tests

The one-sample runs test is useful to detect nonrandom patterns in time-series data.

Which nonparametric test is analogous to a parametric k-sample test for means?

The one-sample runs test is also called the Wald-Wolfowitz test after its inventors.

The Kruskal-Wallis test is a test for randomness in sequential data.

Which nonparametric test is analogous to a two-factor ANOVA without replication?

The Wilcoxon rank sum test (Mann-Whitney test)requires two independent samples.

Parametric tests generally are more powerful than nonparametric tests when normality can be assumed.

Attendees at an outdoor concert can buy pavilion tickets (A)or lawn tickets (B).Below is the output for the one-sample runs to test whether there is a pattern in 32 consecutive ticket purchases. The best conclusion at α = .05 would be:

The Wilcoxon signed-rank test is less powerful than a one-sample test of a mean when the population is actually normal.

Spearman's rank correlation coefficient lies within the range 0 to 1.00 inclusive.

We sometimes call the Wilcoxon rank sum test the Mann/Whitney test,but the two are the same.

At the Seymour Clinic,the total number of patients seen by three doctors over three days is as follows: Which nonparametric test would you use to compare the median number of patients seen by the doctors on each day?

The Kruskal-Wallis test requires c independent samples (where usually c > 2).

The Wilcoxon rank sum test (Mann-Whitney test)can be used even if population variances are unequal.

Which nonparametric test has no parametric counterpart?

The Wilcoxon signed-rank test does not assume a normal population,but it does require a roughly symmetric population.

The Wilcoxon signed-rank test is robust to outliers in the data if the population is at least somewhat symmetric.

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Quality Management

Filters