condition mean min max ZT0-3 50.13086303 36.095950470000005 64.16577559 ZT4-7 81.55625307666668 71.6464176 91.46608855333334 ZT8-11 101.22401913166667 96.73224004333333 105.71579822 ZT12-15 106.33650128000001 101.34351547 111.32948709000001 ZT16-19 109.647309715 102.38750146333334 116.90711796666666 ZT20-23 85.83978127333333 78.73877415666666 92.94078839000001