condition mean min max ZT0-3 25.0041 25.0041 25.0041 ZT4-7 27.5897 27.5897 27.5897 ZT8-11 13.613949999999999 13.613949999999999 13.613949999999999 ZT12-15 18.89765 18.89765 18.89765 ZT16-19 20.08775 20.08775 20.08775 ZT20-23 26.81555 26.81555 26.81555