condition mean min max ZT0-3 132.39 132.39 132.39 ZT4-7 103.1938889 103.1938889 103.1938889 ZT8-11 93.45166665666666 93.45166665666666 93.45166665666666 ZT12-15 98.97111111 98.97111111 98.97111111 ZT16-19 111.58999999999999 111.58999999999999 111.58999999999999 ZT20-23 157.4877778 157.4877778 157.4877778