condition mean min max ZT0-3 10.46946 10.46946 10.46946 ZT4-7 10.3432015 10.3432015 10.3432015 ZT8-11 10.499086 10.499086 10.499086 ZT12-15 11.120571 11.120571 11.120571 ZT16-19 10.1261975 10.1261975 10.1261975 ZT20-23 11.344679 11.344679 11.344679