condition mean min max ZT0-3 1.7437902964999998 1.683424571 1.804156022 ZT4-7 1.1878455302500002 0.930786031 1.4449050295 ZT8-11 11.7916841975 3.8031580145 19.7802103805 ZT12-15 23.93021909 23.127154925 24.733283255 ZT16-19 14.478509465000002 12.701177785 16.255841145 ZT20-23 7.394266506 6.358856588 8.429676424