**What means "out of estimation"?**

That method demands the respect of mathematical assumptions that are tested (a posteriori) with a normality test for residuals.

These tests (

**Why two types of estimation?**

The first estimation is about the average score (in fact the score and its two, three and four powers), and it takes into account 405 wines in 2005.

A second one is about the whole panel of tasters,and makes it possible to assess the influence of each taster on the price. It gives a better "R

- it is about a smaller number of wines (188 wines in 2005) i.e. those tasted by ALL significant tasters

- apart from year 2005, they do not satisfy the mathematical assumptions of a linear regression.

**Warning**