In carrying out a two independent sample t-test for means, I have a choice of selecting "pooled" or "not pooled". If I select the "pooled" option, then I am assuming

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the population variances of the two groups are the same

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the sample sizes of the two groups are the same

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the population means of the two groups are the same

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the sample means of the two groups are the same

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the sample variances of the two groups are the same

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In carrying out a two independent sample t-test for means, I have a choice of se...

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