condition mean min max ZT0-3 58.349999999999994 58.349999999999994 58.349999999999994 ZT4-7 45.6 45.6 45.6 ZT8-11 51.650000000000006 51.650000000000006 51.650000000000006 ZT12-15 53.650000000000006 53.650000000000006 53.650000000000006 ZT16-19 53.65 53.65 53.65 ZT20-23 34.2 34.2 34.2