condition mean min max ZT0-3 83.8019467225 77.49413665 90.10975679500001 ZT4-7 91.0386079425 89.04597387 93.031242015 ZT8-11 146.305692545 118.32652744 174.28485765000002 ZT12-15 247.43053055000001 240.8517315 254.0093296 ZT16-19 224.92732012500002 206.67299865 243.18164160000003 ZT20-23 207.07804327500003 198.696965 215.45912155000002