 This is the 9th and final video in my channel on Regression. Residuals represent the error in a Regression Model. That is, Residuals represent the Variation in the outcome Variable y, which is not explained by the Regression Model. Residuals must be analyze several ways to ensure that they are random, and that they do no represent the Variation caused by some unidentified x-factor.
See the videos page in this website for a listing of available and planned videos.
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Continuing the playlist on Regression, I have uploaded a new video to YouTube: Regression -- Part 4: Multiple Linear. There are 5 Keys to Understanding, here is the 3rd. See the Videos pages of this website for more info on available and planned videos.  Continuing the playlist on Regression, I have uploaded a new video to YouTube: Regression Part 3: Analysis Basics. It talks about things that are required for all 3 types of Regression covered in the book -- Simple Linear, Multiple Linear, and Simple Nonlinear Regression. Topics include clip levels for R squared, Residuals, establishing Cause and Effect, and the dangers of Extrapolation. See the videos page of this website for the status of completed and planned videos.  Continuing the playlist on Regression, I have uploaded a new video to YouTube; Regression -- Part 2: Simple Linear. See the videos page of this website for the status of completed and planned videos.  I just uploaded a new video to YouTube: https://youtu.be/gGkRkDBlICU  For the latest status of my videos completed and planned, see the videos page on this website.
I just uploaded a new video. It's on Covariance, and it is the first in a playlist on Regression.  I just uploaded a new Video, "Standard Deviation". It is part of the playlist on Variation, Variability, Dispersion, and Spread. Below are the 5 Keys to Understanding for this concept. See the videos page of this website for the latest status of available and planned videos.  I just uploaded a new Video, "Variance". It is part of the playlist on Variation, Variability, Dispersion, and Spread. Below are the 6 Keys to Understanding for this concept. See the videos page of this website for the latest status of available and planned videos.  Sums of Squares is an important concept in Variation, playing a major role in ANOVA and Regression. 4 Keys to Understanding and plenty of graphics help to give the viewer an good conceptual understanding.  For the latest status of available and planned videos, visit the Videos page of this website.
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AuthorAndrew A. (Andy) Jawlik is the author of the book, Statistics from A to Z -- Confusing Concepts Clarified, published by Wiley. Archives
March 2021
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