condition mean min max ZT0-3 192.325859 192.325859 192.325859 ZT4-7 403.6467705 403.6467705 403.6467705 ZT8-11 370.29675050000003 370.29675050000003 370.29675050000003 ZT12-15 302.1788745 302.1788745 302.1788745 ZT16-19 199.39514450000001 199.39514450000001 199.39514450000001 ZT20-23 197.0744455 197.0744455 197.0744455