condition mean min max ZT0-3 957.25 957.25 957.25 ZT4-7 1028.6 1028.6 1028.6 ZT8-11 1153.0 1153.0 1153.0 ZT12-15 1368.25 1368.25 1368.25 ZT16-19 1485.05 1485.05 1485.05 ZT20-23 1187.5 1187.5 1187.5