condition mean min max ZT0-3 12.685265 12.685265 12.685265 ZT4-7 13.1267225 13.1267225 13.1267225 ZT8-11 9.10572 9.10572 9.10572 ZT12-15 9.2129125 9.2129125 9.2129125 ZT16-19 9.122578 9.122578 9.122578 ZT20-23 9.629835 9.629835 9.629835