condition mean min max ZT0-3 91.95806666666667 91.95806666666667 91.95806666666667 ZT4-7 94.2268 94.2268 94.2268 ZT8-11 98.1774 98.1774 98.1774 ZT12-15 95.76079999999999 95.76079999999999 95.76079999999999 ZT16-19 92.6987 92.6987 92.6987 ZT20-23 107.843 107.843 107.843