condition mean min max ZT0-3 17.05 17.05 17.05 ZT4-7 9.3 9.3 9.3 ZT8-11 12.2 12.2 12.2 ZT12-15 11.45 11.45 11.45 ZT16-19 55.95 55.95 55.95 ZT20-23 15.700000000000001 15.700000000000001 15.700000000000001