Two sets of sample data, A and B, are given. Without doing any calculations, indicate in which set of sample data, A or B, there is likely to be stronger evidence of a difference in the two population means. Give a brief reason, comparing means and variability, for your answer.

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Dataset A Dataset B Group 1 Group 2 Group 1 Group 2 13 18 13 48 14 19 14 49 15 20 15 16 21 16 51 17 22 17 52 X1 = 15 x2 = 20 | x1 = 15 x2 = 50 %3D