condition mean min max ZT0-3 18.8454047225 13.48324057 24.207568875 ZT4-7 29.952393685 29.674527285 30.230260085 ZT8-11 36.484575885 27.46705617 45.502095600000004 ZT12-15 44.3879314475 43.90215278 44.873710115 ZT16-19 47.0118156725 45.386732935 48.63689841 ZT20-23 54.907301385 51.333777385 58.480825385