condition mean min max ZT0-3 0.8714975 0.8714975 0.8714975 ZT4-7 0.7120975 0.7120975 0.7120975 ZT8-11 0.5402335 0.5402335 0.5402335 ZT12-15 1.144795 1.144795 1.144795 ZT16-19 0.950433 0.950433 0.950433 ZT20-23 0.971938 0.971938 0.971938