condition mean min max ZT0-3 11.029115000000001 7.878595 12.707450000000001 ZT4-7 10.88035 10.88035 10.88035 ZT8-11 13.40765 13.40765 13.40765 ZT12-15 18.0081 15.991900000000001 20.0243 ZT16-19 17.6722 17.6722 17.6722 ZT20-23 16.8586 16.8586 16.8586