condition mean min max ZT0-3 14.01783 10.171040000000001 16.006999999999998 ZT4-7 6.738645 6.738645 6.738645 ZT8-11 5.540005 5.540005 5.540005 ZT12-15 7.625985 7.167434999999999 8.084535 ZT16-19 7.2560400000000005 7.2560400000000005 7.2560400000000005 ZT20-23 12.11375 12.11375 12.11375