كما يجب عليك التأكد من استلام الأموال من المشترين قبل شحن المنتجات أو تقديم الخدمات. In statistics, the median absolute deviation (MAD) is a robust measure of the variability of a univariate sample of quantitative data. It birey also refer to the population parameter that is estimated by the MAD https://intensedebate.com/people/rayzoo9