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Question: If two independent samples are used in a hypothesis test concerning the difference between population means for which the combined degrees of freedom is twenty, which of the following could not be true about the sample sizes n1 & n2

[A]     n1 = 13 & n2 = 9
[B]     n1 = 12 & n2 = 8
[C]     n1 = 12 & n2 = 10
[D]     Cannot be determined from the given information

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