condition mean min max ZT0-3 17.847875000000002 17.27465 18.4211 ZT4-7 14.3274 14.3274 14.3274 ZT8-11 28.41465 28.41465 28.41465 ZT12-15 0 0 0 ZT16-19 41.174 41.174 41.174 ZT20-23 31.147399999999998 31.147399999999998 31.147399999999998