condition mean min max ZT0-3 0.319899 0.1613535 0.4784445 ZT4-7 0.810909 0.810909 0.810909 ZT8-11 0.7036325 0.7036325 0.7036325 ZT12-15 0 0 0 ZT16-19 1.1643385 1.1643385 1.1643385 ZT20-23 0.7967685 0.7967685 0.7967685