condition mean min max ZT0-3 3258.6499999999996 3258.6499999999996 3258.6499999999996 ZT4-7 1985.5 1985.5 1985.5 ZT8-11 2271.55 2271.55 2271.55 ZT12-15 1590.0 1590.0 1590.0 ZT16-19 3036.2 3036.2 3036.2 ZT20-23 3265.5 3265.5 3265.5