condition mean min max ZT0-3 12.2241 12.2241 12.2241 ZT4-7 13.7164 13.7164 13.7164 ZT8-11 17.1188 17.1188 17.1188 ZT12-15 18.47955 18.47955 18.47955 ZT16-19 27.0065 27.0065 27.0065 ZT20-23 10.8064 10.8064 10.8064