condition mean min max ZT0-3 13.15115 12.00915 14.7861 ZT4-7 8.363240000000001 8.363240000000001 8.363240000000001 ZT8-11 6.10776 6.10776 6.10776 ZT12-15 17.317125 16.7165 17.91775 ZT16-19 11.7431 11.7431 11.7431 ZT20-23 14.948 14.948 14.948