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In an independent t test scenario, the two distributions of means will have the same variance when the degrees of freedom are greater than 30.
In an independent t test scenario, the two distributions of means will have the same variance when the degrees of freedom are greater than 30. one variance estimate is much larger than the other. the two samples have the same N. S2Pooled is a weighted average
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Business Analytics Data Analysis and Decision Making
Authors: S. Christian Albright, Wayne L. Winston
5th edition
1133629601, 9781285965529 , 978-1133629603
