condition mean min max ZT0-3 44.4302 44.4302 44.4302 ZT4-7 32.4561 32.4561 32.4561 ZT8-11 20.91155 20.91155 20.91155 ZT12-15 41.54015 41.54015 41.54015 ZT16-19 54.160650000000004 54.160650000000004 54.160650000000004 ZT20-23 49.57725 49.57725 49.57725