condition mean min max ZT0-3 4.796055000000001 4.47496 5.1171500000000005 ZT4-7 19.9059 19.9059 19.9059 ZT8-11 55.98865 55.98865 55.98865 ZT12-15 0 0 0 ZT16-19 34.27095 34.27095 34.27095 ZT20-23 16.0785 16.0785 16.0785