condition mean min max ZT0-3 13.225075 13.1494 13.30075 ZT4-7 11.704 11.704 11.704 ZT8-11 13.70785 13.70785 13.70785 ZT12-15 0 0 0 ZT16-19 14.711099999999998 14.711099999999998 14.711099999999998 ZT20-23 15.3819 15.3819 15.3819