condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.040104 0.040104 0.040104 ZT12-15 0.024543166666666668 0.0 0.049086333333333336 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0