condition mean min max ZT0-3 1.5608499999999998 1.41021 1.71149 ZT4-7 1.4121899999999998 1.4121899999999998 1.4121899999999998 ZT8-11 0.920595 0.920595 0.920595 ZT12-15 0 0 0 ZT16-19 1.97315 1.97315 1.97315 ZT20-23 2.67987 2.67987 2.67987