condition mean min max ZT0-3 14.357 14.357 14.357 ZT4-7 12.7637 12.7637 12.7637 ZT8-11 14.03155 14.03155 14.03155 ZT12-15 15.2512 15.2512 15.2512 ZT16-19 17.5514 17.5514 17.5514 ZT20-23 13.232299999999999 13.232299999999999 13.232299999999999