condition mean min max ZT0-3 149.220007 149.220007 149.220007 ZT4-7 184.6431445 184.6431445 184.6431445 ZT8-11 136.937256 136.937256 136.937256 ZT12-15 181.699389 181.699389 181.699389 ZT16-19 172.7717265 172.7717265 172.7717265 ZT20-23 131.886412 131.886412 131.886412