3.2. Classification
Table 3 summarizes the classification results in the test set by using SIMCA, PLS-DA, and SPA-LDA at 95% confidence level. The test set was composed of 6 Argentine black, 4 imported black, and 5 Argentine green tea samples, totaling 15 samples. The classification was carried out by evaluating the discrimination of green and black teas as either national or imported black teas.