UNIT IV

REGRESSION ANALYSIS AND FORECASTING

In the first three units of the text, you were introduced to basic statistics, distributions, and how to make inferences through confidence interval estimation and hypothesis testing. In Unit IV, we explore relationships between variables through regression analysis and learn how to develop models that can be used to predict one variable by another variable or even multiple variables. We will examine a cadre of statistical techniques that can be used to forecast values from time-series data and how to measure how well the forecast is.