condition mean min max ZT0-3 1.86655 1.86655 1.86655 ZT4-7 1.7983500000000001 1.7983500000000001 1.7983500000000001 ZT8-11 0.7033590000000001 0.7033590000000001 0.7033590000000001 ZT12-15 0.584769 0.584769 0.584769 ZT16-19 0.9108989999999999 0.9108989999999999 0.9108989999999999 ZT20-23 1.9313209999999998 1.9313209999999998 1.9313209999999998