condition mean min max ZT0-3 0.82657275 0.723404 0.9297415 ZT4-7 0.7890115 0.7890115 0.7890115 ZT8-11 0.734399 0.734399 0.734399 ZT12-15 0 0 0 ZT16-19 0.9141060000000001 0.9141060000000001 0.9141060000000001 ZT20-23 0.778672 0.778672 0.778672