condition mean min max ZT0-3 1394.9 1394.9 1394.9 ZT4-7 2350.4 2350.4 2350.4 ZT8-11 2166.05 2166.05 2166.05 ZT12-15 2414.85 2414.85 2414.85 ZT16-19 2089.3 2089.3 2089.3 ZT20-23 1364.25 1364.25 1364.25