condition mean min max ZT0-3 12.983 11.9452 14.020800000000001 ZT4-7 8.627690000000001 8.627690000000001 8.627690000000001 ZT8-11 11.0351 11.0351 11.0351 ZT12-15 0 0 0 ZT16-19 12.07105 12.07105 12.07105 ZT20-23 10.955300000000001 10.955300000000001 10.955300000000001