I performed a regression where I wanted to explain the quality of a particular red wine using three environmental factors. These factors are: x1- Avg....

I performed a regression where I wanted to explain the quality of a particular red wine using three environmental factors. These factors are:

x1- Avg. Temperature

X2- Total rainfall in the winter before the vintage

x3- total rainfall when the grapes were being harvested

The degrees for the error sum of squares (also known as the residual sum of squares) is 23.

How many observations are in the dataset used to build this model?