condition mean min max ZT0-3 1.8325815085 1.8090337579999998 1.856129259 ZT4-7 1.7985885525 1.2540499015 2.3431272035 ZT8-11 0.3807455745 0.034878843 0.726612306 ZT12-15 0.0888421165 0.015216277 0.162467956 ZT16-19 0.0620762025 0.045857237 0.078295168 ZT20-23 0.0 0.0 0.0