condition mean min max ZT0-3 401.0 401.0 401.0 ZT4-7 306.3 306.3 306.3 ZT8-11 321.4 321.4 321.4 ZT12-15 366.5 366.5 366.5 ZT16-19 549.85 549.85 549.85 ZT20-23 619.25 619.25 619.25