condition mean min max ZT0-3 37.8314 37.8314 37.8314 ZT4-7 28.9371 28.9371 28.9371 ZT8-11 27.953 27.953 27.953 ZT12-15 32.5118 32.5118 32.5118 ZT16-19 46.0429 46.0429 46.0429 ZT20-23 43.44845 43.44845 43.44845