Hi @dimacapi07 ,

If you look at your Effect Tests output, you'll see that for your Fresh/Frozen factor, there are zero (0) degrees of freedom. Since there are no degrees of freedom, it's essentially a constrained fit and an error of the estimate cannot be calculated, and therefore no F-value or LogWorth can be calculated.

It's analogous to fitting a line between two points -- the line is perfectly fit, and the two parameters that make up the line, slope and y-intercept, cannot vary because there are only those two points and they define the line perfectly, so there is no "wiggle room" for the fit and you won't be able to calculate any errors or F-values, etc. It's undefined.

DS