condition mean min max ZT0-3 0.1897797 0.1414634 0.238096 ZT4-7 0.233855 0.233855 0.233855 ZT8-11 0.6490134999999999 0.6490134999999999 0.6490134999999999 ZT12-15 0 0 0 ZT16-19 0.24451299999999998 0.24451299999999998 0.24451299999999998 ZT20-23 0.501035 0.501035 0.501035