condition mean min max ZT0-3 0.5468645 0.542172 0.551557 ZT4-7 0.911319 0.911319 0.911319 ZT8-11 1.276993 1.276993 1.276993 ZT12-15 0 0 0 ZT16-19 0.903184 0.903184 0.903184 ZT20-23 0.3647615 0.3647615 0.3647615