condition mean min max ZT0-3 1396.045 1396.045 1396.045 ZT4-7 1334.16 1334.16 1334.16 ZT8-11 916.8095000000001 916.8095000000001 916.8095000000001 ZT12-15 481.27099999999996 481.27099999999996 481.27099999999996 ZT16-19 550.3335 550.3335 550.3335 ZT20-23 1138.67 1138.67 1138.67