condition mean min max ZT0-3 0.22889868333333332 0.15538105 0.3006815 ZT4-7 0.2643315 0.2643315 0.2643315 ZT8-11 0.4206955 0.4206955 0.4206955 ZT12-15 0.86510925 0.808187 0.9220315000000001 ZT16-19 0.520141 0.520141 0.520141 ZT20-23 0.9874665 0.9874665 0.9874665