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. 2020 Oct 5;6(10):e05067. doi: 10.1016/j.heliyon.2020.e05067

Table 10.

Statistical parameters derived from the external validation of statistical models.

Parameter Statistical model
PLS PCR ANN
n 4 4 4
R2ext 0.71 0.94 0.92
p-value < 0.001 <0.001 < 0.001