condition mean min max ZT0-3 8.86146 8.86146 8.86146 ZT4-7 7.134024999999999 7.134024999999999 7.134024999999999 ZT8-11 9.75199 9.75199 9.75199 ZT12-15 11.59215 11.59215 11.59215 ZT16-19 15.110000000000001 15.110000000000001 15.110000000000001 ZT20-23 14.8576 14.8576 14.8576