condition mean min max ZT0-3 549.65 549.65 549.65 ZT4-7 948.4 948.4 948.4 ZT8-11 852.2 852.2 852.2 ZT12-15 775.3 775.3 775.3 ZT16-19 464.1 464.1 464.1 ZT20-23 582.5 582.5 582.5