condition mean min max ZT0-3 0.01507075 0.01507075 0.01507075 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.018657333333333335 0.018657333333333335 0.018657333333333335 ZT16-19 0.065308 0.065308 0.065308 ZT20-23 0.014685249999999999 0.014685249999999999 0.014685249999999999