condition mean min max ZT0-3 79.427572 79.427572 79.427572 ZT4-7 85.349046 85.349046 85.349046 ZT8-11 91.1124125 91.1124125 91.1124125 ZT12-15 66.14361149999999 66.14361149999999 66.14361149999999 ZT16-19 149.1551465 149.1551465 149.1551465 ZT20-23 144.139194 144.139194 144.139194