condition mean min max ZT0-3 120.7792087 113.7648423 127.7935751 ZT4-7 116.975046775 112.6865503 121.26354325 ZT8-11 109.6612434925 101.942692385 117.3797946 ZT12-15 82.33968455249999 73.61552098 91.06384812499999 ZT16-19 99.6438942325 94.253688915 105.03409955000001 ZT20-23 98.60175800249999 96.5220861 100.68142990499999