# What is linear regression in statistics?

## What is linear regression in statistics?

Linear regression analysis is used to predict the value of a variable based on the value of another variable. The variable you want to predict is called the dependent variable. The variable you are using to predict the other variable’s value is called the independent variable.

## When linear regression is not appropriate?

If a linear model is appropriate, the histogram should look approximately normal and the scatterplot of residuals should show random scatter . If we see a curved relationship in the residual plot, the linear model is not appropriate. Another type of residual plot shows the residuals versus the explanatory variable.

**Is linear regression the most accurate?**

If the true model is linear, then linear regression will be the most accurate, for appropriate definition of what is accurate.

**What is the disadvantage of linear regression?**

Advantages And Disadvantages

Advantages | Disadvantages |
---|---|

Linear regression performs exceptionally well for linearly separable data | The assumption of linearity between dependent and independent variables |

Easier to implement, interpret and efficient to train | It is often quite prone to noise and overfitting |

### What are the limitations of regression?

Limitations to Correlation and Regression

- We are only considering LINEAR relationships.
- r and least squares regression are NOT resistant to outliers.
- There may be variables other than x which are not studied, yet do influence the response variable.
- A strong correlation does NOT imply cause and effect relationship.

### Why is it called linear regression?

The linearity assumption in linear regression means the model is linear in parameters (i.e coefficients of variables) & may or may not be linear in variables.

**What is linear regression in simple words?**

What is simple linear regression? Simple linear regression is a regression model that estimates the relationship between one independent variable and one dependent variable using a straight line. Both variables should be quantitative.

**What are the disadvantages of the linear regression model?**

#### Why linear regression is appropriate?

You can use simple linear regression when you want to know: How strong the relationship is between two variables (e.g. the relationship between rainfall and soil erosion). The value of the dependent variable at a certain value of the independent variable (e.g. the amount of soil erosion at a certain level of rainfall).