condition mean min max ZT0-3 10.2515 10.2515 10.2515 ZT4-7 8.864035000000001 8.864035000000001 8.864035000000001 ZT8-11 9.17648 9.17648 9.17648 ZT12-15 9.035535 9.035535 9.035535 ZT16-19 11.3271 11.3271 11.3271 ZT20-23 10.92015 10.92015 10.92015