Journal
AMERICAN STATISTICIAN
Volume 61, Issue 2, Pages 159-160Publisher
AMER STATISTICAL ASSOC
DOI: 10.1198/000313007X188379
Keywords
Bernoulli distribution; non-normal sample; zero covariance without independence
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It is of interest to know what the covariance of sample mean and sample variance is without the assumption of normality. In this article we study such a problem. We show a simple derivation of the formula for computing covariance of sample mean and sample variance, and point Out a way of constructing examples of zero covariance without independence. A small example is included to help teachers explain to students.
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