condition mean min max ZT0-3 298.8 298.8 298.8 ZT4-7 167.0 167.0 167.0 ZT8-11 160.0 160.0 160.0 ZT12-15 302.95 302.95 302.95 ZT16-19 434.35 434.35 434.35 ZT20-23 350.65 350.65 350.65