condition mean min max ZT0-3 0.6488722499999999 0.45025499999999996 0.8474895 ZT4-7 0.39276 0.39276 0.39276 ZT8-11 1.02073 1.02073 1.02073 ZT12-15 0 0 0 ZT16-19 1.55946 1.55946 1.55946 ZT20-23 0.9079240000000001 0.9079240000000001 0.9079240000000001