condition mean min max ZT0-3 3133.7 3133.7 3133.7 ZT4-7 2622.8 2622.8 2622.8 ZT8-11 2442.35 2442.35 2442.35 ZT12-15 2233.1 2233.1 2233.1 ZT16-19 2035.0 2035.0 2035.0 ZT20-23 2332.3999999999996 2332.3999999999996 2332.3999999999996