condition mean min max ZT0-3 0.014708925 0.0 0.02941785 ZT4-7 0.5964855 0.5964855 0.5964855 ZT8-11 0.8227095 0.8227095 0.8227095 ZT12-15 0 0 0 ZT16-19 0.2023405 0.2023405 0.2023405 ZT20-23 0.5801324999999999 0.5801324999999999 0.5801324999999999