condition mean min max ZT0-3 28.40885 25.808149999999998 31.00955 ZT4-7 43.280100000000004 43.280100000000004 43.280100000000004 ZT8-11 21.5123 21.5123 21.5123 ZT12-15 0 0 0 ZT16-19 15.22083 15.22083 15.22083 ZT20-23 37.09905 37.09905 37.09905