condition mean min max ZT0-3 0.032395 0.0 0.06468435 ZT4-7 0.02984515 0.02984515 0.02984515 ZT8-11 0.03144375 0.03144375 0.03144375 ZT12-15 0.101548375 0.06951 0.13358675 ZT16-19 0.11926800000000001 0.11926800000000001 0.11926800000000001 ZT20-23 0.13332195 0.13332195 0.13332195