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hybrid=data.frame(data=c(7.4,6.6,6.7,6.1,6.5,7.2,7.1,7.3,6.8,6.9,7.0,6.8,6.3,6.4,6.7,6.5,6.8,6.4,6.9,7.6,6.8,7.3),species=c(rep("A",6),rep("B",5),rep("C",6),rep("D",5)))
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