Getting started with regression

Regression means the unbiased prediction of the conditional expected value, using independent variables, and the dependent variable. A dependent variable is the variable that we want to predict. Examples of a dependent variable could be a number such as price, sales, or weight. An independent variable is a characteristic, or feature, that helps to determine the dependent variable. So, for example, the independent variable of weight could help to determine the dependent variable of weight.

Regression analysis can be used in forecasting, time series modeling, and cause and effect relationships.

Simple linear regression

R can help us to build prediction stories with Tableau. Linear regression is a great starting place when you want to predict a number, such as profit, cost, or sales. In simple linear regression, there is only one independent variable x, which predicts a dependent value, y.

Simple linear regression is usually expressed with a line that identifies...