condition mean min max ZT0-3 0.23843366666666668 0.173433 0.2844545 ZT4-7 0.35070199999999996 0.35070199999999996 0.35070199999999996 ZT8-11 0.4054025 0.4054025 0.4054025 ZT12-15 0.8058117499999999 0.7613345 0.850289 ZT16-19 0.607843 0.607843 0.607843 ZT20-23 0.481226 0.481226 0.481226