condition mean min max ZT0-3 0.048656 0.039536999999999996 0.057775 ZT4-7 0.02576073333333333 0.02576073333333333 0.02576073333333333 ZT8-11 0.0242116 0.0242116 0.0242116 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0