condition mean min max ZT0-3 56.159266 56.159266 56.159266 ZT4-7 64.768694 64.768694 64.768694 ZT8-11 75.206084 75.206084 75.206084 ZT12-15 97.9530255 97.9530255 97.9530255 ZT16-19 76.604906 76.604906 76.604906 ZT20-23 74.4714615 74.4714615 74.4714615