condition mean min max ZT0-3 0.81706212925 0.212079098 1.4220451605 ZT4-7 4.114061194 2.4478865845 5.7802358035 ZT8-11 13.38692489 10.74539865 16.02845113 ZT12-15 15.485307939250001 14.2072103685 16.763405510000002 ZT16-19 6.2114227605 5.735061909000001 6.687783612 ZT20-23 6.263812882 5.989121348499999 6.5385044155