condition mean min max ZT0-3 157.623443 157.623443 157.623443 ZT4-7 165.340258 165.340258 165.340258 ZT8-11 172.50782049999998 172.50782049999998 172.50782049999998 ZT12-15 199.996658 199.996658 199.996658 ZT16-19 155.10199649999998 155.10199649999998 155.10199649999998 ZT20-23 176.19352650000002 176.19352650000002 176.19352650000002