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The proposed variable sampling interval (VSI) X̄ chart uses a short sampling interval if X̄ is close to but not actually outside the control limits and a long sampling interval if X̄ is close to ...
Mohammad Jafari Jozani, François Perron, On the Use of Antithetic Variables to Improve Over the Ranked Set Sampling Estimator of the Population Mean, Sankhyā: The Indian Journal of Statistics, Series ...