condition mean min max ZT0-3 55.66355 55.66355 55.66355 ZT4-7 53.660349999999994 53.660349999999994 53.660349999999994 ZT8-11 40.35935 40.35935 40.35935 ZT12-15 37.11775 37.11775 37.11775 ZT16-19 41.814750000000004 41.814750000000004 41.814750000000004 ZT20-23 59.221599999999995 59.221599999999995 59.221599999999995