condition mean min max ZT0-3 2567.9381280000002 2566.6124200000004 2569.263836 ZT4-7 2295.9603045000003 1804.3778295 2787.5427795000005 ZT8-11 2255.09202725 2202.7087615 2307.475293 ZT12-15 3657.729126 3388.5347435000003 3926.9235085 ZT16-19 4114.570643999999 3964.1566704999996 4264.9846175 ZT20-23 3352.3482142499997 3099.8487999999998 3604.8476284999997