condition mean min max ZT0-3 5.994256136750001 2.7740415410000003 9.2144707325 ZT4-7 10.32725317875 10.0656749465 10.588831411000001 ZT8-11 5.483766275000001 5.4361472815 5.5313852685 ZT12-15 8.38415073875 6.500736073500001 10.267565403999999 ZT16-19 13.3926161 11.633361675 15.151870525 ZT20-23 7.296312679 5.644004798499999 8.9486205595