condition mean min max ZT0-3 2484.2 2484.2 2484.2 ZT4-7 3642.1 3642.1 3642.1 ZT8-11 3341.55 3341.55 3341.55 ZT12-15 3003.95 3003.95 3003.95 ZT16-19 2929.1499999999996 2929.1499999999996 2929.1499999999996 ZT20-23 2682.3 2682.3 2682.3