condition mean min max ZT0-3 0.20738396225 0.1144336875 0.300334237 ZT4-7 1.2007203945 0.83125485 1.5701859390000001 ZT8-11 5.789443714500001 4.1855830605 7.393304368500001 ZT12-15 12.880002904 11.744468668 14.01553714 ZT16-19 8.563151087000001 8.241375891 8.884926283 ZT20-23 11.7159386895 9.536498053999999 13.895379325