condition mean min max ZT0-3 10.3748225 10.363495 10.38615 ZT4-7 7.071655 7.071655 7.071655 ZT8-11 8.909275000000001 8.909275000000001 8.909275000000001 ZT12-15 0 0 0 ZT16-19 11.52705 11.52705 11.52705 ZT20-23 12.715 12.715 12.715