condition mean min max ZT0-3 12.69905 12.267949999999999 13.13015 ZT4-7 10.46926 10.46926 10.46926 ZT8-11 9.292155000000001 9.292155000000001 9.292155000000001 ZT12-15 0 0 0 ZT16-19 12.22705 12.22705 12.22705 ZT20-23 12.77955 12.77955 12.77955