condition mean min max ZT0-3 0.010732475 0.0 0.02146495 ZT4-7 0.04477655 0.04477655 0.04477655 ZT8-11 0.0223666 0.0223666 0.0223666 ZT12-15 0 0 0 ZT16-19 0.0865747 0.0865747 0.0865747 ZT20-23 0.0218225 0.0218225 0.0218225