condition mean min max ZT0-3 0.0801227245 0.0 0.160245449 ZT4-7 1.559773945 0.2046427165 2.9149051735000002 ZT8-11 15.7789006635 13.036821877000001 18.52097945 ZT12-15 103.0352716025 86.279654655 119.79088855 ZT16-19 59.47917908750001 50.106576825000005 68.85178135000001 ZT20-23 33.86421404 31.26060503 36.46782305