condition mean min max ZT0-3 627.503144 627.503144 627.503144 ZT4-7 597.2640685 597.2640685 597.2640685 ZT8-11 673.634319 673.634319 673.634319 ZT12-15 676.9818225 676.9818225 676.9818225 ZT16-19 695.8927565 695.8927565 695.8927565 ZT20-23 796.102337 796.102337 796.102337