Question: If we have 3 datasets in which dataset 1 has 10 observations, dataset 2 has 20 observations, and dataset 3 has 30 observations, what will

If we have 3 datasets in which dataset 1 has 10 observations, dataset 2 has 20 observations, and dataset 3 has 30 observations, what will be a true statement when the mean for all three datasets is equal? *

Dataset 1 has the smallest variance
Dataset 3 has the maximum variance
All datasets have the same variance

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