condition mean min max ZT0-3 663.75 663.75 663.75 ZT4-7 1001.9 1001.9 1001.9 ZT8-11 921.5 921.5 921.5 ZT12-15 930.5999999999999 930.5999999999999 930.5999999999999 ZT16-19 836.6 836.6 836.6 ZT20-23 732.75 732.75 732.75