condition mean min max ZT0-3 10.61655 10.61655 10.61655 ZT4-7 7.439815 7.439815 7.439815 ZT8-11 8.932694999999999 8.932694999999999 8.932694999999999 ZT12-15 12.0524 12.0524 12.0524 ZT16-19 15.25405 15.25405 15.25405 ZT20-23 12.00095 12.00095 12.00095