When calculating the standard error of X1- X2, under what assumption do you pool the sample...

 

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When calculating the standard error of X1- X2, under what assumption do you pool the sample variances sand s? Known population variances. Unknown population variances that are assumed unequal. Unknown population variances that are assumed equal. All of these choices are correct. When calculating the standard error of X1- X2, under what assumption do you pool the sample variances sand s? Known population variances. Unknown population variances that are assumed unequal. Unknown population variances that are assumed equal. All of these choices are correct.

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The nequired assumption is Vnknown population variances that are as... View the full answer