condition mean min max ZT0-3 0.73860925 0.723966 0.7532525 ZT4-7 0.6931555 0.6931555 0.6931555 ZT8-11 1.218963 1.218963 1.218963 ZT12-15 0 0 0 ZT16-19 1.0080545 1.0080545 1.0080545 ZT20-23 1.1088235 1.1088235 1.1088235