condition mean min max ZT0-3 49.414716 49.414716 49.414716 ZT4-7 55.6148985 55.6148985 55.6148985 ZT8-11 59.469945 59.469945 59.469945 ZT12-15 57.6472035 57.6472035 57.6472035 ZT16-19 49.1356435 49.1356435 49.1356435 ZT20-23 29.6757215 29.6757215 29.6757215