condition mean min max ZT0-3 908.962968 908.962968 908.962968 ZT4-7 698.5497045 698.5497045 698.5497045 ZT8-11 653.504959 653.504959 653.504959 ZT12-15 788.2889325 788.2889325 788.2889325 ZT16-19 722.163905 722.163905 722.163905 ZT20-23 740.973724 740.973724 740.973724