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Some introductory remarks are made about statistical selection. Statistical selection procedures are answering questions like "Which variety can be considered to be the best? If. The principles of the Indifference Zone approach of Bechho are summarized. A generalization of the concept of the Indifference Zone selection is presented. The Indifference Zone approach is generalized by introducing a preference threshold. By this way there are three possibilities of decision: Correct Selection, False Selection and No Selection. A practical application in the field of Oil Palm cultivation is given