condition mean min max ZT0-3 11.46024 10.30873 12.61175 ZT4-7 8.652915 8.652915 8.652915 ZT8-11 5.375655 5.375655 5.375655 ZT12-15 0 0 0 ZT16-19 10.138570000000001 10.138570000000001 10.138570000000001 ZT20-23 10.195795 10.195795 10.195795