condition mean min max ZT0-3 1587.1 1587.1 1587.1 ZT4-7 1493.6 1493.6 1493.6 ZT8-11 1566.75 1566.75 1566.75 ZT12-15 1558.25 1558.25 1558.25 ZT16-19 1281.6 1281.6 1281.6 ZT20-23 1601.4 1601.4 1601.4