condition mean min max ZT0-3 53.091300000000004 53.091300000000004 53.091300000000004 ZT4-7 48.08585 48.08585 48.08585 ZT8-11 34.766949999999994 34.766949999999994 34.766949999999994 ZT12-15 53.90115 53.90115 53.90115 ZT16-19 49.96445 49.96445 49.96445 ZT20-23 47.6826 47.6826 47.6826