condition mean min max ZT0-3 11.322189999999999 10.632629999999999 12.01175 ZT4-7 14.386 14.386 14.386 ZT8-11 15.469999999999999 15.469999999999999 15.469999999999999 ZT12-15 0 0 0 ZT16-19 14.093250000000001 14.093250000000001 14.093250000000001 ZT20-23 12.1873 12.1873 12.1873