4.0 RESULTS AND DISCUSSION
4.1 Fitting the model for the sensory parameters
A summary of the statistics of the regressions fitted showed the standard deviation, the R
2 and
adjusted R
2
, predicted R
2 and the predicted residual error sum of squares (PRESS). These were
the indicators of how well the sensory models fitted the data. For goodness-of-fit, low standard
deviations, R
2
near 1 and relatively low PRESS were desired (Design-Expert, 2007).