condition mean min max ZT0-3 781.45 781.45 781.45 ZT4-7 825.8 825.8 825.8 ZT8-11 610.15 610.15 610.15 ZT12-15 528.1 528.1 528.1 ZT16-19 421.04999999999995 421.04999999999995 421.04999999999995 ZT20-23 561.2 561.2 561.2