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Probability, Statistics and Random Processes by Pappu Kousalya

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12

Regression

Prerequisites

Before you start reading this unit, you should:

  • Know the equation of a straight line
  • Know the basic ideas of graphs

Learning Objectives

After going through this unit, you would be able to:

  • Estimate the value of a random variable (the dependent variable) given that the value of an associated variable (the independent variable) is known
  • Use the least squares estimating equation to predict future values of the dependent variable
  • Learn limitations of regression
  • Use the least squares method to calculate the equation of a regression line for a given set of data
  • Understand the assumptions under which the regression analysis is carried out
  • Evaluate as to how good the regression is?
12.1  REGRESSION

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