condition mean min max ZT0-3 26.23715 23.3674 29.1069 ZT4-7 25.0171 25.0171 25.0171 ZT8-11 81.7804 81.7804 81.7804 ZT12-15 0 0 0 ZT16-19 82.54395 82.54395 82.54395 ZT20-23 49.114850000000004 49.114850000000004 49.114850000000004