X

Download Making ANOVA & Tukey HSD testing clearer with Compact Letter Display PowerPoint Presentation

SlidesFinder-Advertising-Design.jpg

Login   OR  Register
X


Iframe embed code :



Presentation url :

Home / Science & Technology / Science & Technology Presentations / Making ANOVA & Tukey HSD testing clearer with Compact Letter Display PowerPoint Presentation

Making ANOVA & Tukey HSD testing clearer with Compact Letter Display PowerPoint Presentation

Ppt Presentation Embed Code   Zoom Ppt Presentation

PowerPoint is the world's most popular presentation software which can let you create professional Making ANOVA & Tukey HSD testing clearer with Compact Letter Display powerpoint presentation easily and in no time. This helps you give your presentation on Making ANOVA & Tukey HSD testing clearer with Compact Letter Display in a conference, a school lecture, a business proposal, in a webinar and business and professional representations.

The uploader spent his/her valuable time to create this Making ANOVA & Tukey HSD testing clearer with Compact Letter Display powerpoint presentation slides, to share his/her useful content with the world. This ppt presentation uploaded by gaetan in Science & Technology ppt presentation category is available for free download,and can be used according to your industries like finance, marketing, education, health and many more.

About This Presentation

Making ANOVA & Tukey HSD testing clearer with Compact Letter Display Presentation Transcript

Slide 1 - Making ANOVA & Tukey HSD testing clearer with Compact Letter Display Gaetan Lion, September 3, 2022 1
Slide 2 - Introduction ANOVA is an incomplete test because it only tells you if several variables, or factors, have different Means. But, it does not tell you which specific ones are truly different. Maybe out of 5 variables (A, B, C, D, E) only E is truly different. And, this sole variable causes the ANOVA F test to be statistically significant. The other 4 variables could have similar Means. The Tukey Highly Significant Difference test (Tukey HSD) remedies the above situation. This is a post-ANOVA test that tests whether each variable is different from any of the other ones. And, Tukey HSD is conducted on a one-on-one matched variable basis just like an unpaired t test. So, Tukey HSD tests the difference in Means for A vs. B, A vs. C, A vs. D, etc. While the Tukey HSD test provides an abundance of supplementary information to ANOVA, its output is overwhelming for non-statisticians. Compact Letter Display (CLD) dramatically improves the clarity of the ANOVA & Tukey HSD test output. 2
Slide 3 - CLD basics 1. CLD identifies where the statistical significant differences are. Each variable that shares a Mean that is not statistically different from another one will share the same letter. For examples: ”a” “ab” “b” The above indicates that the first variable “a” has a Mean that is statistically different from the third one “b”. But, the second variable “ab” has a Mean that is not statistically different from either the first or third variable. ”a” “ab” “bc” “c” The above indicates that the first variable “a” has a Mean that is statistically different from the third variable “bc” and the fourth one “c”. But, this first variable “a” is not statistically different from the second one “ab”. 2. CLD also ranks the variables in descending Mean order. So, the variable with the highest Mean will be named “a” (if it is statistically different from all the others). And, the variable with the lowest Mean will have the highest letter. 3
Slide 4 - Working through an Example We are going to test if the average rainfall in 5 West Coast cities is statistically different. These cities are: Eugene (OR) Portland (OR) San Francisco (CA) Seattle (WA) Spokane (WA) The data is annual rainfall (1951 – 2021). The data source is NOAA. 4
Slide 5 - The basic data summary 5
Slide 6 - ANOVA F test. So, we know that the Cities have statistically different Average Rainfall But, as shown this ANOVA F test really does not tell you much if anything. 6
Slide 7 - Tukey HSD test identifies the difference between specific matched cities Tukey HSD test output We can observe that two pairs of matched cities have non-statistically difference in Means. These are: Portland - Seattle. p-value 0.54 San Francisco - Spokane. p-value 0.08 San Francisco – Spokane is not quite statistically significant, when using an alpha level of 0.05. 7
Slide 8 - Using a Box Plot to visualize this data 8 Top whisker = ~ 99.7th percentile Top of box = 75th percentile Line near middle of box = Median or 50th percentile Bottom of box = 25th percentile Bottom whisker = ~ 0.3d percentile Box Plot explanation This box plot has a lot of information. But, it is a bit challenging to readily identify the cities’ rainfall levels that are different from each other vs. the ones that are similar. There is more info on Box Plot visual interpretation on the last slide in the Appendix section.
Slide 9 - Putting an information package together Tukey HSD test output All the info is there. But, it is rather challenging to interpret. 9
Slide 10 - Rearranging the basic data with CLD The original data set just sorted in alphabetical order is not that informative. The revised data set using CLD is a lot more informative. The cities are ranked by Mean rainfall descending order. And, the CLD identifies readily which cities have statistically significant Mean differences, and which do not. Eugene has a statistically significant higher Mean rainfall than all the other cities. So, it is “a”. Seattle and Portland have similar Mean rainfall (not statistically different). So, they both come in as “b”. San Francisco and Spokane have less rainfall than the other cities. And, their respective rainfall levels are similar. So, they come in as “c”. 10
Slide 11 - Rearranging the Box Plots using CLD Within this Box Plot, it is challenging to differentiate cities’ rainfall relative levels and to figure out which ones are similar vs. dissimilar. This Box Plot using CLD is more informative. The cities’ rainfall levels are sorted in descending order. The color intensity is tiered with more dense texture reflecting higher rainfall levels. And, the CLD letters identify which cities have similar rainfall levels and which do not. 11
Slide 12 - 12 Upgraded information package with CLD Using CLD, you can readily identify the cities with similar vs. dissimilar rainfall levels.
Slide 13 - Appendix: Box Plot explanation 13
 

Frequently Asked Questions

> About SlidesFinder?

Slidesfinder is a website that allows users to upload and share their PowerPoint presentations online. It provides a platform for individuals and businesses to share their ideas and knowledge through presentations, and for others to view and download these presentations for educational or professional purposes.
Slidesfinder offers a wide range of presentation topics and categories, including business, education, science, technology, health, and more. Users can also search for presentations using keywords, tags, or by category. The website provides tools to create professional presentations with rich media, animations, and graphics.



One of the key features of Slidesfinder is its user-friendly interface, which allows users to easily upload, view, and share presentations. Users can also embed their presentations in their websites or blogs using the website's embed code feature.
Slidesfinder also offers premium services, such as the ability to create private presentations and to download presentations in high-quality formats. However, the basic features of Slidesfinder are free to use, making it accessible to anyone who wants to share their ideas and knowledge through presentations.

> How do I register with SlidesFinder?

Go to registration page (you can see signup link on top of website page) https://www.slidesfinder.com/signup . If you have facebook/gmail account them just click on SIGN IN WITH FACEBOOK OR SIGN IN WITH GOOGLE button, by this you will be a registered member of slidesfinder without filling any form, required detail automatically will be fatch from your account. If you do not a Facebook account, then click on "Signup". Fill all required fields and you will be a registered member of slidesfinder.

> Is slidesfinder account confirmation is mandatory?

Yes it is mandetory to active your account to login.

> Do I need to signup/login on SlidesFinder before uploading a PowerPoint presentation?

Yes, you need to login with your account before uploading presentation. Your username will be displayed on your uploaded presentation. Your registered email id is needed for sending your stats of uploaded presentation.

Slidesfinder is a sharing website for PowerPoint presentations search and share. Find your interest in the form of powerpoint presentations on slidesfinder and save your valuable time . On Slidesfinder you get presentations from our huge library of professional ppt presentations. We believe in making your search INFORMATIVE and FUN. Find your best ppt presentation from a pool of PowerPoint presentations stacked under important industry categories like business & management, heath & Wellness,eduction & training etc. We provide unique informative PowerPoint presentation for marketers, presenters and educationists. These professional PowerPoint presentations are uploaded by professionals from across numerous industry segments.These ppt presentations are available for FREE download.

Not just finding your interest, but facilitate you broadcast your interest. We have created this platform for easy sharing of PowerPoint presentations, ensuring that these presentations get maximum exposure. Create your slidesfinder account and upload PowerPoint presentations for free, share on social media platforms and BUILD YOUR CROWD WITH PRESENTATION !!

The Great Buddha says, "Share your knowledge.It’s a way to achieve immortality"! So, start sharing knowledge and we are here to make that immortal !!

© 2013-2024 SlidesFinder. All rights reserved.

Re-productivity of content are not allowed. Without prior written permission from author, commercial use of any content is illegal.