condition mean min max ZT0-3 0.9685295 0.9685295 0.9685295 ZT4-7 0.574616 0.574616 0.574616 ZT8-11 0.6847305 0.6847305 0.6847305 ZT12-15 1.247168 1.247168 1.247168 ZT16-19 0.8995595 0.8995595 0.8995595 ZT20-23 1.140363 1.140363 1.140363