condition mean min max ZT0-3 12.9224 12.9224 12.9224 ZT4-7 13.3368 13.3368 13.3368 ZT8-11 9.240504999999999 9.240504999999999 9.240504999999999 ZT12-15 9.99189 9.99189 9.99189 ZT16-19 11.5664 11.5664 11.5664 ZT20-23 17.01605 17.01605 17.01605