condition mean min max ZT0-3 0.26956375 0.207287 0.3318405 ZT4-7 0.3635855 0.3635855 0.3635855 ZT8-11 2.424765 2.424765 2.424765 ZT12-15 0 0 0 ZT16-19 1.4544855 1.4544855 1.4544855 ZT20-23 0.9232635 0.9232635 0.9232635