condition mean min max ZT0-3 825.2 825.2 825.2 ZT4-7 1000.8 1000.8 1000.8 ZT8-11 977.4000000000001 977.4000000000001 977.4000000000001 ZT12-15 856.95 856.95 856.95 ZT16-19 846.0 846.0 846.0 ZT20-23 814.3499999999999 814.3499999999999 814.3499999999999