condition mean min max ZT0-3 19.44845 19.44845 19.44845 ZT4-7 15.47495 15.47495 15.47495 ZT8-11 16.9949 16.9949 16.9949 ZT12-15 19.45165 19.45165 19.45165 ZT16-19 21.34825 21.34825 21.34825 ZT20-23 19.72515 19.72515 19.72515