condition mean min max ZT0-3 12.978815 11.10508 14.85255 ZT4-7 9.705110000000001 9.705110000000001 9.705110000000001 ZT8-11 12.106535000000001 12.106535000000001 12.106535000000001 ZT12-15 0 0 0 ZT16-19 5.670275 5.670275 5.670275 ZT20-23 11.3874 11.3874 11.3874