condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03475206983333333 0.0 0.06950413966666666 ZT8-11 0.0 0.0 0.0 ZT12-15 0.01583318566666667 0.0 0.03166637133333334 ZT16-19 0.015134629000000002 0.0 0.030269258000000004 ZT20-23 0.0 0.0 0.0