condition mean min max ZT0-3 0.258320975 0.20927824 0.30736371 ZT4-7 0.25874155125 0.2580376435 0.259445459 ZT8-11 0.74271481725 0.42239349449999997 1.06303614 ZT12-15 1.4219846727499998 1.2856098299999998 1.5583595154999998 ZT16-19 1.116496153 1.046162288 1.186830018 ZT20-23 1.999190431 1.4323959215 2.5659849405