condition mean min max ZT0-3 31.85445 14.857099999999999 41.140249999999995 ZT4-7 13.36345 13.36345 13.36345 ZT8-11 11.72655 11.72655 11.72655 ZT12-15 19.2797 17.76125 20.79815 ZT16-19 27.35775 27.35775 27.35775 ZT20-23 42.76975 42.76975 42.76975