condition mean min max ZT0-3 6.3926799999999995 5.580679999999999 7.20468 ZT4-7 12.9783 12.9783 12.9783 ZT8-11 5.748424999999999 5.748424999999999 5.748424999999999 ZT12-15 0 0 0 ZT16-19 2.56803 2.56803 2.56803 ZT20-23 5.15909 5.15909 5.15909