condition mean min max ZT0-3 22.631999999999998 21.964 23.299999999999997 ZT4-7 44.12465 44.12465 44.12465 ZT8-11 65.7645 65.7645 65.7645 ZT12-15 0 0 0 ZT16-19 63.36265 63.36265 63.36265 ZT20-23 48.7779 48.7779 48.7779