condition mean min max ZT0-3 0.0408793405 0.0 0.081758681 ZT4-7 0.222965099 0.0 0.445930198 ZT8-11 0.96356233275 0.327970536 1.5991541295 ZT12-15 1.2251768395 1.0450977705 1.4052559085 ZT16-19 1.4147381209999998 1.2740715644999998 1.5554046774999999 ZT20-23 1.0292316769999998 0.6143854725 1.4440778815