condition mean min max ZT0-3 10.19866 10.19866 10.19866 ZT4-7 9.122214 9.122214 9.122214 ZT8-11 10.3072015 10.3072015 10.3072015 ZT12-15 9.5102255 9.5102255 9.5102255 ZT16-19 10.8219695 10.8219695 10.8219695 ZT20-23 10.9383 10.9383 10.9383