condition mean min max ZT0-3 679.9 679.9 679.9 ZT4-7 554.0 554.0 554.0 ZT8-11 517.5999999999999 517.5999999999999 517.5999999999999 ZT12-15 517.55 517.55 517.55 ZT16-19 771.85 771.85 771.85 ZT20-23 793.75 793.75 793.75