CUSUM CONTROL CHARTS FOR ZERO-TRUNCATED NEGATIVE BINOMIAL AND GEOMETRIC DISTRIBUTIONS
Keywords:control chart, Average Run Length (ARL), zero truncated negative binomial distribution (ZTNBD), zero-truncated geometric distribution (ZTGD)
In this paper CUSUM control charts for zero-truncated negative binomial distribution (ZTNBD) and zero-truncated geometric distribution (ZTGD) are constructed. Average run length (ARL) is studied for different values of the parameters of both the distributions. The method of Johnson (1961) is used for constructing the CUSUM chart.
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