Inferential Statisticseasy
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In a study comparing two independent population means, what is the effect of assuming equal variances (pooled variance) compared to unequal variances (Welch's approximation) on the degrees of freedom?
In a study comparing two independent population means, what is the effect of assuming equal variances (pooled variance) compared to unequal variances (Welch's approximation) on the degrees of freedom?