Video 6: Variable Selection
This video discusses the role of the Adjusted R-Squared in helping us determine which variables should be used in multiple regression models. TABLE OF CONTENTS: 00:00 Introduction 00:10 The Variable Selection Problem 00:53 Strategies for Variable Selection 01:38 Data for Example: Vehicle’s MPG 02:48 Strategy 1 03:48 Model 1: Using All Variables 04:32 Model 2: Removing Acceleration 05:04 Model 3: Removing Acceleration and Cylinders 05:27 Problems with Strategy 1 06:18 Objectives of Regressions 08:06 Fixing or Adjusting the R2 08:48 The Adjusted R-Squared 09:57 Model 1: Using All Variables 10:38 Model 2: Removing Acceleration 11:06 Model 3: Removing Acceleration and Cylinders 11:38 Model 2 is our Best Model with the Max. R2 11:48 You are not done…
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