condition mean min max ZT0-3 0.2736815 0.2736815 0.2736815 ZT4-7 0.08399525000000001 0.08399525000000001 0.08399525000000001 ZT8-11 0.0374678 0.0374678 0.0374678 ZT12-15 0.058036 0.058036 0.058036 ZT16-19 0.23406100000000002 0.23406100000000002 0.23406100000000002 ZT20-23 0.39832650000000003 0.39832650000000003 0.39832650000000003