condition mean min max ZT0-3 15.924270785000001 13.46696887 18.3815727 ZT4-7 19.265758507500003 18.963000855 19.56851616 ZT8-11 12.380864061249998 12.256728441999998 12.5049996805 ZT12-15 10.065602792750001 9.3876380835 10.743567502000001 ZT16-19 10.94864380575 9.9526185205 11.944669091000002 ZT20-23 15.885412702500002 14.6253692 17.145456205000002