condition mean min max ZT0-3 0.260438 0.11324699999999999 0.35507 ZT4-7 1.486955 1.486955 1.486955 ZT8-11 1.992295 1.992295 1.992295 ZT12-15 0.5431995000000001 0.402563 0.683836 ZT16-19 1.0276785 1.0276785 1.0276785 ZT20-23 0.97678 0.97678 0.97678