Database Management Exam > Database Management Videos > Mastering R Programming: For Data Science and Analytics > Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3)
Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) Video Lecture | Mastering R Programming: For Data Science and Analytics - Database Management
FAQs on Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) Video Lecture - Mastering R Programming: For Data Science and Analytics - Database Management
| 1. What is the Mann-Whitney U test and how is it related to the Wilcoxon Rank-Sum test? |  |
Ans. The Mann-Whitney U test, also known as the Wilcoxon Rank-Sum test, is a nonparametric statistical test used to compare two independent groups. It is used to determine whether there is a significant difference between the medians of the two groups. The test is based on ranking the observations from both groups and comparing the sums of ranks between the groups.
| 2. When should I use the Mann-Whitney U test instead of a t-test? | |
Ans. The Mann-Whitney U test should be used when the assumptions of the t-test are not met. It is a nonparametric test, meaning it does not rely on assumptions about the distribution of the data. Therefore, it is more appropriate when the data is skewed or when outliers are present. Additionally, the Mann-Whitney U test can be used when the data is ordinal or when the sample sizes are small.
| 3. How do I interpret the results of the Mann-Whitney U test? | |
Ans. The results of the Mann-Whitney U test provide a U statistic and a p-value. The U statistic represents the sum of the ranks for one of the groups. A lower U value indicates that the group with the lower ranks has a significantly higher distribution. The p-value represents the probability of observing the data given that the null hypothesis is true. If the p-value is less than the chosen significance level (usually 0.05), we reject the null hypothesis and conclude that there is a significant difference between the groups.
| 4. Can I use the Mann-Whitney U test for more than two groups? | |
Ans. No, the Mann-Whitney U test can only be used to compare two independent groups. If you have more than two groups, you would need to use a different test, such as the Kruskal-Wallis test, which is an extension of the Mann-Whitney U test for multiple independent groups.
| 5. Is the Mann-Whitney U test robust to outliers? | |
Ans. Yes, the Mann-Whitney U test is robust to outliers. Since the test is based on the ranks of the data rather than the actual values, extreme values have less impact on the results. However, it is important to note that if the outliers are influential and not representative of the population, it may still be appropriate to remove or address them before conducting the test.
Related Exams
About this Video
|
4.69/5 Rating |
|
Dec 27, 2024 Last updated |
Video Description: Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) for Database Management 2024 is part of Mastering R Programming: For Data Science and Analytics preparation.
The notes and questions for Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) have been prepared according to the Database Management exam syllabus.
Information about Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) covers all important topics for Database Management 2024 Exam.
Find important definitions, questions, notes, meanings, examples, exercises and tests below for Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3).
Introduction of Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) in English is available as part of our Mastering R Programming: For Data Science and Analytics for Database Management & Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) in
Hindi for Mastering R Programming: For Data Science and Analytics course. Download more important topics related with notes, lectures and mock test series for
Database Management Exam by signing up for free.
Description
Video Lecture & Questions for Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) Video Lecture | Mastering R Programming: For Data Science and Analytics - Database Management - Database Management full syllabus preparation | Free video for Database Management exam to prepare for Mastering R Programming: For Data Science and Analytics.
Information about Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3)
Here you can find the meaning of Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) defined & explained in the simplest way possible.
Besides explaining types of Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) theory, EduRev gives you an ample number of questions to practice Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) tests,
examples and also practice Database Management tests.
Video Timeline
|
Explore Courses for Database Management exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) Video Lecture | Mastering R Programming: For Data Science and Analytics - Database Management
,MCQs
,Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) Video Lecture | Mastering R Programming: For Data Science and Analytics - Database Management
,Sample Paper
,mock tests for examination
,practice quizzes
,Extra Questions
,study material
,shortcuts and tricks
,Objective type Questions
,Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) Video Lecture | Mastering R Programming: For Data Science and Analytics - Database Management
,Exam
,past year papers
,Summary
,Semester Notes
,Previous Year Questions with Solutions
,Viva Questions
,video lectures
,Important questions
,Free
,ppt
;
Study Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) on the App
Students of Database Management can study Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3),
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Mann Whitney U aka Wilcoxon Rank-Sum Test in R (R Tutorial 4.3) is prepared as per the latest Database Management syllabus.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up
within 7 days!
within 7 days!
Takes less than 10 seconds to signup