condition mean min max ZT0-3 207.91525000000001 205.64350000000002 210.187 ZT4-7 207.655 207.655 207.655 ZT8-11 206.483 206.483 206.483 ZT12-15 0 0 0 ZT16-19 326.1865 326.1865 326.1865 ZT20-23 239.027 239.027 239.027