condition mean min max ZT0-3 95.2535 95.2535 95.2535 ZT4-7 76.73675 76.73675 76.73675 ZT8-11 61.42815 61.42815 61.42815 ZT12-15 72.3067 72.3067 72.3067 ZT16-19 86.65424999999999 86.65424999999999 86.65424999999999 ZT20-23 94.55369999999999 94.55369999999999 94.55369999999999