Left panel: relationship between the true and the predicted t_1/2 values using the six trained RF models through a bi-variate joint distribution or 2D probability density function. The black data points represent the scatter between the RF predictions and the true t_1/2 values for the test dataset relative to the ideal case of perfect predictions, depicted by a 45-degree dotted gray diagonal line. Right panel: probability density function for the relative errors between the true t_1/2 and the predicted values by the RF models, along with the median error and the standard deviation, 1σ.