condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.3342616666666667 0.15661 0.5119133333333333 ZT16-19 0.29860549999999997 0.221131 0.37607999999999997 ZT20-23 0 0 0