Question: Suppose that two independent samples from the same normal population were pooled to form the following estimator of the population variance: _ NlSi2 + AW

Suppose that two independent samples from the same normal population were pooled to form the following estimator of the population variance:

_ NlSi2 + AW

~~ Nx + N2 - 2 '

Discuss the sampling distribution of this pooled estimator of a2.

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