condition mean min max ZT0-3 11.757644 11.757644 11.757644 ZT4-7 11.725531499999999 11.725531499999999 11.725531499999999 ZT8-11 10.519300000000001 10.519300000000001 10.519300000000001 ZT12-15 10.9854765 10.9854765 10.9854765 ZT16-19 10.9974475 10.9974475 10.9974475 ZT20-23 12.5403725 12.5403725 12.5403725