Linear Regression Analysis 5E Montgomery, Peck & Vining

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Presentation transcript:

Linear Regression Analysis 5E Montgomery, Peck & Vining Example 3-1. The Delivery Time Data The model of interest is y = 0 + 1x1+ 2x2 +  Linear Regression Analysis 5E Montgomery, Peck & Vining

Linear Regression Analysis 5E Montgomery, Peck & Vining Example 3-1. The Delivery Time Data Figure 3.4 Scatterplot matrix for the delivery time data from Example 3.1. Linear Regression Analysis 5E Montgomery, Peck & Vining

Linear Regression Analysis 5E Montgomery, Peck & Vining Example 3-1 The Delivery Time Data Figure 3.5 Three-dimensional scatterplot of the delivery time data from Example 3.1. Linear Regression Analysis 5E Montgomery, Peck & Vining

Linear Regression Analysis 5E Montgomery, Peck & Vining Example 3-1 The Delivery Time Data Linear Regression Analysis 5E Montgomery, Peck & Vining

Linear Regression Analysis 5E Montgomery, Peck & Vining Example 3-1 The Delivery Time Data Linear Regression Analysis 5E Montgomery, Peck & Vining

Linear Regression Analysis 5E Montgomery, Peck & Vining Example 3-1 The Delivery Time Data Linear Regression Analysis 5E Montgomery, Peck & Vining

Linear Regression Analysis 5E Montgomery, Peck & Vining

Linear Regression Analysis 5E Montgomery, Peck & Vining MINITAB Output Linear Regression Analysis 5E Montgomery, Peck & Vining

Example 3.2 Delivery Time Data Linear Regression Analysis 5E Montgomery, Peck & Vining

Example 3.2 Delivery Time Data Linear Regression Analysis 5E Montgomery, Peck & Vining

3.2.5 Inadequacy of Scatter Diagrams in Multiple Regression Scatter diagrams of the regressor variable(s) against the response may be of little value in multiple regression. These plots can actually be misleading If there is an interdependency between two or more regressor variables, the true relationship between xi and y may be masked. Linear Regression Analysis 5E Montgomery, Peck & Vining

Linear Regression Analysis 5E Montgomery, Peck & Vining Illustration of the Inadequacy of Scatter Diagrams in Multiple Regression Linear Regression Analysis 5E Montgomery, Peck & Vining