Question 1

The Friedman test applies to which situation?

Accepted Answer

A) When the problem objective is to compare two or more populations. 
B) The data are either ordinal or interval but not nominal. 
C) The data are generated from a randomized block experiment. 
D) All of these choices are true. 
A) When the problem objective is to compare two or more populations. 
B) The data are either ordinal or interval but not nominal. 
C) The data are generated from a randomized block experiment. 
D) All of these choices are true.

Question 2

In a normal approximation to the Wilcoxon rank sum test,the standardized test statistic is calculated as z = 1.80.For a two-tail test,the p-value is:

Accepted Answer

A) 0.0359 
B) 0.4641 
C) 0.2321 
D) 0.0718 
A) 0.0359 
B) 0.4641 
C) 0.2321 
D) 0.0718

Question 3

In the case of comparing two population locations,the Kruskal-Wallis test can only determine whether a difference in locations exists.To determine which population has a higher location requires the use of the Wilcoxon ____________________ test.

Accepted Answer

The answer of In the case of comparing two population...

Question 4

If both variables have a normal distribution,you should use the Spearman rank correlation coefficient to look for relationships,rather than the Pearson correlation coefficient.

Accepted Answer

A) True 
 B)False

Question 5

Statistical methods that require few assumptions,if any,about the population distribution are known as:

Accepted Answer

A) parametric techniques. 
B) nonparametric techniques. 
C) free agent techniques. 
D) All of these choices are true. 
A) parametric techniques. 
B) nonparametric techniques. 
C) free agent techniques. 
D) All of these choices are true.

Question 6

Coffee
 ​ A supermarket chain has its own house brand of coffee.The general manager claims that their coffee is better than the coffee sold by a well-known Coffee Shop chain.To test the claim 40 individuals are randomly selected to participate in the following experiment.Each respondent is given the two brands of coffee to taste (without any identification)and asked to judge which one is better.Suppose that 25 people judge the Coffee Shop chain brand better,four say that the brands taste the same,and the rest claim that the supermarket brand is better. ​ ​
-{Coffee Narrative} What is the p-value of the test in the previous question?

Accepted Answer

The answer of Coffee
 ​ A supermarket chain has its...

Question 7

The Friedman test is always one tailed.The inequality sign in the alternative hypothesis is always ____________________.

Accepted Answer

The answer of The Friedman test is always one tailed.The...

Question 8

Which of the following tests employs matched-pairs sampling?

Accepted Answer

A) The Mann-Whitney test. 
B) The Wilcoxon rank-sum test. 
C) The Wilcoxon signed-rank sum test. 
D) None of these choices. 
A) The Mann-Whitney test. 
B) The Wilcoxon rank-sum test. 
C) The Wilcoxon signed-rank sum test. 
D) None of these choices.

Question 9

Suppose using Kruskal-Wallis test,there are five samples,and the value of the test statistic is calculated as H = 12.32.Then the most accurate statement that can be made about the p-value of the test is that it is greater than 0.025 but smaller than 0.05

Accepted Answer

A) True 
 B)False

Question 10

Song Ratings
 A music critic wanted to determine whether or not music listeners of different age groups evaluate a song differently.With this objective,he commissioned a survey that asked people their ratings of the most popular songs.The rating categories were: 1 = terrible,2 = fair,3 = good,and 4 = excellent.Each respondent was also asked to categorize his or her age as either: 1 = teenager,2 = young adult (20-34),3 = middle age (35-50),and 4 = over 50. The results are shown below.   ​ ​
-{Song Ratings Narrative} Which test can the movie critic use in this situation?

Accepted Answer

The Kruska

Question 11

The Wilcoxon signed rank sum test requires you to rank the absolute ____________________.

Accepted Answer

The answer of The Wilcoxon signed rank sum test requires...

Question 12

In a Wilcoxon rank sum test,the two sample sizes are 4 and 6,and the value of the Wilcoxon test statistic is T = 20.If the test is a two-tail and the level of significance is α = 0.05,then:

Accepted Answer

A) the null hypothesis will be rejected. 
B) the null hypothesis will not be rejected. 
C) the alternative hypothesis will not be rejected. 
D) not enough information has been given to answer this question. 
A) the null hypothesis will be rejected. 
B) the null hypothesis will not be rejected. 
C) the alternative hypothesis will not be rejected. 
D) not enough information has been given to answer this question.

Question 13

When data are ordinal and you want to analyze matched pairs differences,you use the ____________________ test.

Accepted Answer

The answer of When data are ordinal and you want...

Question 14

A statistician investigating the relationship between the amount of precipitation (in inches)and the number of automobile accidents gathered data for 10 randomly selected days.The results are shown below.(We cannot assume these variables have normal distributions.)   Calculate the Spearman rank correlation coefficient,and test to determine at the 5% significance level whether we can infer that a linear relationship exists between the number of accidents and the amount of precipitation.

Accepted Answer

r_s = 0.896 H₀: ρ_s = 0 vs.H₁: ρ_s≠ 0 Rejection

Question 15

The alternative hypothesis for the Friedman test is that all the population locations differ.

Accepted Answer

A) True 
 B)False

Question 16

Song Ratings
 A music critic wanted to determine whether or not music listeners of different age groups evaluate a song differently.With this objective,he commissioned a survey that asked people their ratings of the most popular songs.The rating categories were: 1 = terrible,2 = fair,3 = good,and 4 = excellent.Each respondent was also asked to categorize his or her age as either: 1 = teenager,2 = young adult (20-34),3 = middle age (35-50),and 4 = over 50. The results are shown below.   ​ ​
-{Song Ratings Narrative} Explain how to use the p-value for testing the hypotheses.

Accepted Answer

Since p-va

Question 17

The population Spearman correlation coefficient is labeled ____________________ and the sample statistic used to estimate its value is labeled ____________________.

Accepted Answer

The answer of The population Spearman correlation coefficient is labeled...

Question 18

A nonparametric method to compare two populations,when the samples are matched pairs and the data are ordinal,is the:

Accepted Answer

A) sign test. 
B) matched pairs t-test 
C) Wilcoxon rank sum test. 
D) Wilcoxon signed rank sum test.. 
A) sign test. 
B) matched pairs t-test 
C) Wilcoxon rank sum test. 
D) Wilcoxon signed rank sum test..

Question 19

The Kruskal-Wallis test can be used to test for a difference between two populations.It will produce the same outcome as the two-tail Wilcoxon rank sum test.

Accepted Answer

A) True 
 B)False

Question 20

Because of the rising costs of construction accidents many construction firms have instituted safety courses.Employees are encouraged to take these courses designed to heighten safety awareness.A company is trying to decide which one of two courses to institute.To help make a decision,eight employees take course 1 and another eight take course 2.Each employee writes a test,which is marked,out of a possible 25.The results are shown below.Does this data provide sufficient evidence at the 5% level of significance to conclude that the marks from course 2 are higher than those of course 1? Assume that the scores are not normally distributed.

Accepted Answer

H₀: The two population locations are the

The Friedman test applies to which situation?

In a normal approximation to the Wilcoxon rank sum test,the standardized test statistic is calculated as z = 1.80.For a two-tail test,the p-value is:

In the case of comparing two population locations,the Kruskal-Wallis test can only determine whether a difference in locations exists.To determine which population has a higher location requires the use of the Wilcoxon ____________________ test.

If both variables have a normal distribution,you should use the Spearman rank correlation coefficient to look for relationships,rather than the Pearson correlation coefficient.

Statistical methods that require few assumptions,if any,about the population distribution are known as:

The Friedman test is always one tailed.The inequality sign in the alternative hypothesis is always ____________________.

Which of the following tests employs matched-pairs sampling?

Suppose using Kruskal-Wallis test,there are five samples,and the value of the test statistic is calculated as H = 12.32.Then the most accurate statement that can be made about the p-value of the test is that it is greater than 0.025 but smaller than 0.05

The Wilcoxon signed rank sum test requires you to rank the absolute ____________________.

In a Wilcoxon rank sum test,the two sample sizes are 4 and 6,and the value of the Wilcoxon test statistic is T = 20.If the test is a two-tail and the level of significance is α = 0.05,then:

When data are ordinal and you want to analyze matched pairs differences,you use the ____________________ test.

The alternative hypothesis for the Friedman test is that all the population locations differ.

The population Spearman correlation coefficient is labeled and the sample statistic used to estimate its value is labeled .

A nonparametric method to compare two populations,when the samples are matched pairs and the data are ordinal,is the:

The Kruskal-Wallis test can be used to test for a difference between two populations.It will produce the same outcome as the two-tail Wilcoxon rank sum test.

What Is Statistics

Graphical Descriptive Techniques 1

Graphical Descriptive Techniques 2

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Model Building

Time-Series Analytics and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

Exam 19: Nonparametric Statistics

The Friedman test applies to which situation?

In a normal approximation to the Wilcoxon rank sum test,the standardized test statistic is calculated as z = 1.80.For a two-tail test,the p-value is:

In the case of comparing two population locations,the Kruskal-Wallis test can only determine whether a difference in locations exists.To determine which population has a higher location requires the use of the Wilcoxon ____________________ test.

If both variables have a normal distribution,you should use the Spearman rank correlation coefficient to look for relationships,rather than the Pearson correlation coefficient.

Statistical methods that require few assumptions,if any,about the population distribution are known as:

The Friedman test is always one tailed.The inequality sign in the alternative hypothesis is always ____________________.

Which of the following tests employs matched-pairs sampling?

Suppose using Kruskal-Wallis test,there are five samples,and the value of the test statistic is calculated as H = 12.32.Then the most accurate statement that can be made about the p-value of the test is that it is greater than 0.025 but smaller than 0.05

The Wilcoxon signed rank sum test requires you to rank the absolute ____________________.

In a Wilcoxon rank sum test,the two sample sizes are 4 and 6,and the value of the Wilcoxon test statistic is T = 20.If the test is a two-tail and the level of significance is α = 0.05,then:

When data are ordinal and you want to analyze matched pairs differences,you use the ____________________ test.

The alternative hypothesis for the Friedman test is that all the population locations differ.

The population Spearman correlation coefficient is labeled ____________________ and the sample statistic used to estimate its value is labeled ____________________.

A nonparametric method to compare two populations,when the samples are matched pairs and the data are ordinal,is the:

The Kruskal-Wallis test can be used to test for a difference between two populations.It will produce the same outcome as the two-tail Wilcoxon rank sum test.

What Is Statistics

Graphical Descriptive Techniques 1

Graphical Descriptive Techniques 2

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Model Building

Time-Series Analytics and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

The population Spearman correlation coefficient is labeled and the sample statistic used to estimate its value is labeled .