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In addition to spinning technique, machine parameters, operation stages, processing conditions and the physical characteristics of fibre determine its processing behaviour, production efficiency and final yarn and fabric quality. Therefore, predicting the quality characteristics of yarns, especially tensile properties, has been the main target of many studies in the last century. Generally, two approaches were used in these studies for predicting yarn quality from fibre and yarn characteristics: an empirical, statistical approach and a theoretical or analytical approach.

One of the most common statistical approaches is the multiple regression method. Such an approach is used to investigate the interdependence of different fibre properties and to estimate the relative contribution of each fibre property to the overall yarn properties. Several researchers [1-5] have established various regression equations using this method.