condition mean min max ZT0-3 16.20955 16.20955 16.20955 ZT4-7 37.479 37.479 37.479 ZT8-11 19.3876 19.3876 19.3876 ZT12-15 23.45785 23.45785 23.45785 ZT16-19 12.60975 12.60975 12.60975 ZT20-23 12.48573 12.48573 12.48573