condition mean min max ZT0-3 13.648225 13.648225 13.648225 ZT4-7 13.396063999999999 13.396063999999999 13.396063999999999 ZT8-11 13.645834 13.645834 13.645834 ZT12-15 12.949885 12.949885 12.949885 ZT16-19 16.001189 16.001189 16.001189 ZT20-23 13.1747935 13.1747935 13.1747935