condition mean min max ZT0-3 164.09638 164.09638 164.09638 ZT4-7 162.427154 162.427154 162.427154 ZT8-11 73.93012 73.93012 73.93012 ZT12-15 104.7071885 104.7071885 104.7071885 ZT16-19 72.41669950000001 72.41669950000001 72.41669950000001 ZT20-23 91.235845 91.235845 91.235845