condition mean min max ZT0-3 209.02949999999998 209.02949999999998 209.02949999999998 ZT4-7 177.594 177.594 177.594 ZT8-11 183.277 183.277 183.277 ZT12-15 249.8265 249.8265 249.8265 ZT16-19 249.43599999999998 249.43599999999998 249.43599999999998 ZT20-23 257.49850000000004 257.49850000000004 257.49850000000004