condition mean min max ZT0-3 29.86873104916667 29.493766775 30.243695323333334 ZT4-7 29.71821974 29.65566749 29.780771989999998 ZT8-11 30.0749548 28.80094141 31.348968190000004 ZT12-15 25.830979705 24.512819073333333 27.14914033666667 ZT16-19 30.194926390000003 27.59247493 32.797377850000004 ZT20-23 27.4404713 24.65366598 30.22727662