It is calculated using the fourth moment near the mean (M4), as presented in Maroco (2014): (3.57)g2=n2.n+1.M4n−1.n−2.n−3.S4−3.n−12n−2.n−3 where: (3.58)M4=∑i=1nXi−X¯4n, which has the following interpretation:...