When a reaction rate coefficient is extrapolated to a new temperature, this extrapolation has some uncertainty. Measuring this uncertainty is crucial; indeed, if the estimation of the reaction rate coefficient at a new temperature is highly uncertain, then the predictions at the new temperature are not reliable. In order to quantify this uncertainty, the 95% confidence interval of the extrapolated value of the reaction rate coefficient (95% CI) is computed. The 95% CI at a given temperature is the interval where the real value of the reaction rate coefficient has 95% chance of being. The 95% CI will be used to test the robustness of the prediction either by comparing the CI of the reaction rate coefficient prediction to the results of a sensitivity analysis (see Sec. II J and III B) or by using a method that we call "Bootstrap KMC", that will be detailed in Sec. II I.