**Regression analysis**is a statistical method that investigates the relationships between variables. The output of a regression analysis is typically a graph showing the relationship between variables, or an equation for such a graph.

## Examples

In any regression analysis there is a dependent variable and one or more independent variables. The dependent variable is the thing that you expect might change when you change the independent variables. The following are illustrative examples:**Analysis**: How fast a plant grows in different soils.

**Dependent variable**: growth rate of plant

**Independent variable**: soil type

**Analysis**: How income rises or falls with age.

**Dependent variable**: income

**Independent variable**: age

**Analysis**: The relationship between how much it rains and how fast corn grows.

**Dependent variable**: growth rate of corn

**Independent variable**: amount of rain

**Analysis**: How temperate influences ice cream sales.

**Dependent variable**: ice cream sales

**Independent variable**: daily average temperature

**Analysis**: How much does advertising increase sales?

**Dependent variable**: sales

**Independent variable**: advertising spend

**Analysis**: The relationship between the price of a product and demand for that product.

**Dependent variable**: demand

**Independent variable**: price

**Analysis**: Does social media make people unhappy?

**Dependent variable**: self-reported happiness

**Independent variable**: hours spent in social media per week

**Analysis**: The relationship between level of education and income.

**Dependent variable**: income

**Independent variable**: level of education

**Analysis**: The relationship, if any, between the color of a room and people's self-reported mood.

**Dependent variable**: self-reported mood

**Independent variable**: room color

## Use

Regression analysis is used to develop estimates, predictions and forecasts. It can also be used in the process of establishing a relationship of cause and effect between variables. Automated regression analysis is used by technologies such as machine learning.Overview: Regression Analysis | ||

Function | ||

Definition | A statistical method of investigating the relationship between dependent and independent variables.. | |

Value | Analysis of data | |

Related Techniques |