condition mean min max ZT0-3 1212.3 1212.3 1212.3 ZT4-7 1187.5 1187.5 1187.5 ZT8-11 1130.55 1130.55 1130.55 ZT12-15 1371.65 1371.65 1371.65 ZT16-19 1233.65 1233.65 1233.65 ZT20-23 1216.45 1216.45 1216.45