condition mean min max ZT0-3 40.676065 40.676065 40.676065 ZT4-7 23.824283 23.824283 23.824283 ZT8-11 29.7855105 29.7855105 29.7855105 ZT12-15 38.876011 38.876011 38.876011 ZT16-19 34.599259 34.599259 34.599259 ZT20-23 36.774867 36.774867 36.774867