Two groups of randomly-selected students are tested on a regular basis as part of professional appraisals that
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Two groups of randomly-selected students are tested on a regular basis as part of professional appraisals that are conducted on a two-year cycle by a leading financial services company based in London. The first group has 8 students, with their sum of the ranks equal to 65, and the second group has 9 students. Is there sufficient evidence to suggest that the performance of the second group is better than the performance of the first group (assess at 5%)?
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