Abstract
SummaryThis paper explicitly characterizes the general nonnegative‐definite covariance structure for a multivariate normal random vector such that the univariate sample variance is distributed exactly as if the sample observations are normal independent and identically distributed (i.i.d.). This work extends the results of Baldessari (1965) and Stadje (1984) who have characterized the general positive‐definite covariance matrix such that the univariate sample variance is distributed exactly as if the sample observations are normal i.i.d.
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