condition mean min max ZT0-3 10.450459 10.450459 10.450459 ZT4-7 12.3824965 12.3824965 12.3824965 ZT8-11 11.435018 11.435018 11.435018 ZT12-15 10.0840255 10.0840255 10.0840255 ZT16-19 10.7795015 10.7795015 10.7795015 ZT20-23 10.8023235 10.8023235 10.8023235