Quality Control Methods for Multivariate Binomial and Poisson Distributions.

This paper deals with methods of qualify control when observation-vectors are coming from a multivariate binomial or multivariate poisson population. The case when successive observations are time-dependent has been studied under certain assumptions. Further when a sample covariance matrix is singular or near singular, a method has been proposed for translating it into a non-singular estimate under the assumption of conditional independence. Assuming approximate normality a χ²-chart has been proposed. At the end a numerical example is given to illustrate the procedure in this paper. [ABSTRACT FROM AUTHOR]