condition mean min max ZT0-3 47.2151 47.2151 47.2151 ZT4-7 55.2549055 55.2549055 55.2549055 ZT8-11 42.385302499999995 42.385302499999995 42.385302499999995 ZT12-15 38.3098685 38.3098685 38.3098685 ZT16-19 32.975688500000004 32.975688500000004 32.975688500000004 ZT20-23 29.021393500000002 29.021393500000002 29.021393500000002