Linear Regression Flashcards
Why is it called Linear Regression?
Linear : We are attempting to find a linear relationship between independent and dependant variables.
Regression : Regression Analysis is the technique of analysing the relationship between 1 or more independent variables and a dependant variable.
What is the Least Squares Method?
A Linear Regression method to find the linear relationship between an independent and dependent variables via finding the regression line.
The method aims to minimise the sum of squared errors.
Define Simple Linear Regression…
Regression analysis in which we have 1 independent variable and 1 dependent variable.
What is the mathematical representation of the Simple Linear Regression Model?
Yb = b0 + b1x + error
In the Simple Linear Regression model, what does b0 and b1 represent? What is the formula for each?
b0 : Y-intercept
b0 = y(median) + b1 * x(median)
b1 : Regression Slope
b1 = r * sy/sx
