This, again, emphasizes the importance of carefully executing membrane distillation measurements so as to minimize the experimental uncertainty or variability of the data. The effect of type-I error (α-value) on membrane type selection and hypothesis testing is also presented in Figs. 3-b and 2-d. As the α-value gets smaller, the hypothesis testing becomes more stringent but the overall decision-making as to the effect of the membrane type is dictated more by the uncertainty of the reported experimental data as seen by comparing results in Fig. 3