condition mean min max ZT0-3 13.060370962499999 12.777951784999999 13.34279014 ZT4-7 9.38818118975 8.831633046 9.9447293335 ZT8-11 30.364713485 24.318804014999998 36.410622955 ZT12-15 86.17508763000001 71.200795695 101.149379565 ZT16-19 67.8707799375 61.006488995 74.73507088 ZT20-23 51.068804240000006 50.17675108 51.9608574