condition mean min max ZT0-3 0.0218113965 0.0 0.043622793 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0211931695 0.020361055 0.022025284000000003 ZT12-15 0.0237415195 0.0 0.047483039 ZT16-19 0.06324853150000001 0.023827023000000003 0.10267004 ZT20-23 0.06629877533333334 0.023555439666666667 0.10904211100000001