condition mean min max ZT0-3 117.2475 116.107 118.388 ZT4-7 81.4253 81.4253 81.4253 ZT8-11 219.0625 219.0625 219.0625 ZT12-15 0 0 0 ZT16-19 272.244 272.244 272.244 ZT20-23 155.8365 155.8365 155.8365