condition mean min max ZT0-3 56.898716666666665 55.387100000000004 57.67375 ZT4-7 52.70099999999999 52.70099999999999 52.70099999999999 ZT8-11 34.020700000000005 34.020700000000005 34.020700000000005 ZT12-15 40.0416 36.3403 43.742900000000006 ZT16-19 41.5959 41.5959 41.5959 ZT20-23 51.97485 51.97485 51.97485