condition mean min max ZT0-3 65.99475000000001 65.99475000000001 65.99475000000001 ZT4-7 51.167500000000004 51.167500000000004 51.167500000000004 ZT8-11 36.67505 36.67505 36.67505 ZT12-15 46.289100000000005 46.289100000000005 46.289100000000005 ZT16-19 57.2274 57.2274 57.2274 ZT20-23 58.623599999999996 58.623599999999996 58.623599999999996