Video 6: Variable Selection

Описание: 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…