condition mean min max ZT0-3 63.928 63.928 63.928 ZT4-7 20.4681 20.4681 20.4681 ZT8-11 42.6743 42.6743 42.6743 ZT12-15 270.3255 270.3255 270.3255 ZT16-19 376.286 376.286 376.286 ZT20-23 179.941 179.941 179.941