condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0418059535 0.016323306 0.067288601 ZT8-11 0.0 0.0 0.0 ZT12-15 0.011087358333333333 0.0 0.022174716666666667 ZT16-19 0.0 0.0 0.0 ZT20-23 0.010568635 0.0 0.02113727