condition mean min max ZT0-3 65.224875 53.85809999999999 76.59165 ZT4-7 32.07135 32.07135 32.07135 ZT8-11 27.98925 27.98925 27.98925 ZT12-15 0 0 0 ZT16-19 32.17205 32.17205 32.17205 ZT20-23 45.1904 45.1904 45.1904