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 0.0 0.0 0.0 ZT16-19 0.056950749499999995 0.04997481533333333 0.06392668366666666 ZT20-23 0.0 0.0 0.0