Table 3.
Analysis of variance for the OTA extraction data in coffee, transformed into ln y.
Source of variation DF SS RMS F Pr > F
Roasting 2 23.5911 11.7956 Fa = 2084.75 0.000000
Particle size 2 1.4487 0.7243 Fb = 128.02 0.000000
Roasting × particle size 4 0.0848 0.0212 Fc = 3.74 0.021866
Residue 18 0.1018 0.0057
Total 26 25.2264
CV = 3.04%.