condition mean min max ZT0-3 20.244 20.244 20.244 ZT4-7 16.679945 16.679945 16.679945 ZT8-11 11.4497 11.4497 11.4497 ZT12-15 21.1064 21.1064 21.1064 ZT16-19 22.8468 22.8468 22.8468 ZT20-23 27.0367 27.0367 27.0367