condition mean min max ZT0-3 1493.2 1493.2 1493.2 ZT4-7 1416.0 1416.0 1416.0 ZT8-11 1279.15 1279.15 1279.15 ZT12-15 1275.9499999999998 1275.9499999999998 1275.9499999999998 ZT16-19 1345.4 1345.4 1345.4 ZT20-23 1421.65 1421.65 1421.65