Consider the following two sets of rankings for six items.

Note that in the first case the rankings are identical, whereas in the second case the rankings are exactly opposite. What value should you expect for the Spearman rank-correlation coefficient for each of these cases? Explain. Calculate the rank-correlation coefficient for each case.

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Case One Case Two First Second Ranklng First Second Ranking 6 Item Ranking Item Ranking 4 4 4 2 6 6