If other factors are held constant, which of the following sets of data would produce the largest value for an independent-measures t statistic? Group of answer choices The two samples both have n = 15, with sample variances of 20 and 25. The two samples both have n = 15, with variances of 120 and 125. The two samples both have n = 30, with sample variances of 20 and 25. The two samples both have n = 30, with variances of 120 and 125.