condition mean min max ZT0-3 11.4128 11.4128 11.4128 ZT4-7 5.909565000000001 5.909565000000001 5.909565000000001 ZT8-11 10.650884999999999 10.650884999999999 10.650884999999999 ZT12-15 13.71995 13.71995 13.71995 ZT16-19 13.81485 13.81485 13.81485 ZT20-23 13.7549 13.7549 13.7549