condition mean min max ZT0-3 128.10257 128.10257 128.10257 ZT4-7 166.306695 166.306695 166.306695 ZT8-11 173.045259 173.045259 173.045259 ZT12-15 165.477995 165.477995 165.477995 ZT16-19 169.3726755 169.3726755 169.3726755 ZT20-23 173.634362 173.634362 173.634362