condition mean min max ZT0-3 126.75943333333333 105.1928 162.7135 ZT4-7 142.34449999999998 142.34449999999998 142.34449999999998 ZT8-11 104.1885 104.1885 104.1885 ZT12-15 111.795175 103.64925 119.9411 ZT16-19 95.7817 95.7817 95.7817 ZT20-23 83.7476 83.7476 83.7476