condition mean min max ZT0-3 13.720212 13.720212 13.720212 ZT4-7 13.56527 13.56527 13.56527 ZT8-11 12.348176500000001 12.348176500000001 12.348176500000001 ZT12-15 13.16722 13.16722 13.16722 ZT16-19 15.026785 15.026785 15.026785 ZT20-23 14.8115375 14.8115375 14.8115375