condition mean min max ZT0-3 7.522175000000001 7.2833950000000005 7.760955 ZT4-7 6.4945699999999995 6.4945699999999995 6.4945699999999995 ZT8-11 13.431750000000001 13.431750000000001 13.431750000000001 ZT12-15 0 0 0 ZT16-19 13.0115 13.0115 13.0115 ZT20-23 9.611270000000001 9.611270000000001 9.611270000000001