condition mean min max ZT0-3 57.650000000000006 57.650000000000006 57.650000000000006 ZT4-7 76.1 76.1 76.1 ZT8-11 42.15 42.15 42.15 ZT12-15 37.5 37.5 37.5 ZT16-19 43.7 43.7 43.7 ZT20-23 65.4 65.4 65.4