condition mean min max ZT0-3 198.895213775 157.81406615 239.9763614 ZT4-7 89.255302735 85.862635775 92.647969695 ZT8-11 101.2006149825 91.40115746999999 111.00007249500001 ZT12-15 80.59707012250001 76.23397012000001 84.960170125 ZT16-19 76.71050673 75.85840912 77.56260434000001 ZT20-23 58.89344224 54.34579116 63.44109332000001