condition mean min max ZT0-3 2561.35 2561.35 2561.35 ZT4-7 3284.7 3284.7 3284.7 ZT8-11 3160.75 3160.75 3160.75 ZT12-15 3160.6499999999996 3160.6499999999996 3160.6499999999996 ZT16-19 2691.55 2691.55 2691.55 ZT20-23 2854.6 2854.6 2854.6