condition mean min max ZT0-3 973.75 973.75 973.75 ZT4-7 1254.2 1254.2 1254.2 ZT8-11 1177.0 1177.0 1177.0 ZT12-15 1208.55 1208.55 1208.55 ZT16-19 1114.55 1114.55 1114.55 ZT20-23 961.1 961.1 961.1