condition mean min max ZT0-3 0.26355975 0.10615 0.4209695 ZT4-7 1.06918 1.06918 1.06918 ZT8-11 0.8477455 0.8477455 0.8477455 ZT12-15 0 0 0 ZT16-19 0.7301150000000001 0.7301150000000001 0.7301150000000001 ZT20-23 0.8383849999999999 0.8383849999999999 0.8383849999999999