condition mean min max ZT0-3 4.443851666666666 0.0 10.16518 ZT4-7 0.0 0.0 0.0 ZT8-11 10.096515 10.096515 10.096515 ZT12-15 6.9961199999999995 3.706485 10.285755 ZT16-19 3.30301 3.30301 3.30301 ZT20-23 3.558095 3.558095 3.558095