condition mean min max ZT0-3 0.96986 0.96986 0.96986 ZT4-7 0.4464555 0.4464555 0.4464555 ZT8-11 0.364542 0.364542 0.364542 ZT12-15 0.4452205 0.4452205 0.4452205 ZT16-19 1.9626000000000001 1.9626000000000001 1.9626000000000001 ZT20-23 0.9716225 0.9716225 0.9716225