# What is MSE?
MSE = Mean Squared Error
It measures the amount of error in a statistical model. Shows how much the values of a set differ from the mean (average) value, squared.
The lower the MSE = the better the modell/predictions. The higher the MSE = the worse the modell/predictions.
Statistical model - with errors:
# Calculation: Formula
# Calculation: Example
Let’s say you have the sales data of a product of all months.
