condition mean min max ZT0-3 11.312470000000001 9.94874 12.676200000000001 ZT4-7 7.5611 7.5611 7.5611 ZT8-11 11.6128 11.6128 11.6128 ZT12-15 0 0 0 ZT16-19 12.61495 12.61495 12.61495 ZT20-23 13.08075 13.08075 13.08075