condition mean min max ZT0-3 1002.512464 1002.512464 1002.512464 ZT4-7 980.548493 980.548493 980.548493 ZT8-11 796.067937 796.067937 796.067937 ZT12-15 813.407192 813.407192 813.407192 ZT16-19 1066.0317625 1066.0317625 1066.0317625 ZT20-23 1286.5813825 1286.5813825 1286.5813825