Question: 3. Considered two methods of estimating V ar( X Y ). Under the assumption that the two popu- lation variances were equal, we estimated this

3. Considered two methods of estimating V ar( X Y ). Under the assumption that the two popu- lation variances were equal, we estimated this quantity by s2 p( 1 n 1 m ) and without this assumption by s2 X n s2 Y m . Show that these two estimations are identical if m = n

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