condition mean min max ZT0-3 4.900612499999999 4.37468 5.426545 ZT4-7 6.258755000000001 6.258755000000001 6.258755000000001 ZT8-11 9.548575 9.548575 9.548575 ZT12-15 0 0 0 ZT16-19 17.6742 17.6742 17.6742 ZT20-23 7.36393 7.36393 7.36393