condition mean min max ZT0-3 0.5730740000000001 0.5289 0.617248 ZT4-7 0.2415135 0.2415135 0.2415135 ZT8-11 0.285094 0.285094 0.285094 ZT12-15 0 0 0 ZT16-19 0.519604 0.519604 0.519604 ZT20-23 0.3334984 0.3334984 0.3334984