condition mean min max ZT0-3 557.0999999999999 557.0999999999999 557.0999999999999 ZT4-7 670.8 670.8 670.8 ZT8-11 598.4 598.4 598.4 ZT12-15 543.6 543.6 543.6 ZT16-19 573.55 573.55 573.55 ZT20-23 547.45 547.45 547.45