condition mean min max ZT0-3 3260.6000000000004 3260.6000000000004 3260.6000000000004 ZT4-7 3791.0 3791.0 3791.0 ZT8-11 4257.55 4257.55 4257.55 ZT12-15 4457.35 4457.35 4457.35 ZT16-19 4012.6499999999996 4012.6499999999996 4012.6499999999996 ZT20-23 3432.5 3432.5 3432.5