condition mean min max ZT0-3 0.59499925 0.5148809999999999 0.6751175 ZT4-7 1.0830685 1.0830685 1.0830685 ZT8-11 0.727714 0.727714 0.727714 ZT12-15 0 0 0 ZT16-19 1.3282150000000001 1.3282150000000001 1.3282150000000001 ZT20-23 1.02654 1.02654 1.02654