condition mean min max ZT0-3 28.640875 23.4104 33.87135 ZT4-7 28.7051 28.7051 28.7051 ZT8-11 48.57825 48.57825 48.57825 ZT12-15 0 0 0 ZT16-19 75.8339 75.8339 75.8339 ZT20-23 41.6644 41.6644 41.6644