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Levene's
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4:16
YouTube
Research By Design
Pooled Variance in t Tests (11-4)
The pooled variance is “a weighted mean of the two samples’ variances.” This video explains the concept simply. You have two samples. Each sample has its own variance. When you combine the two samples in the t tests, you need to account for the relative amounts of variance. I will use the example of mixing glasses of milk to illustrate ...
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