condition mean min max ZT0-3 11.609 10.52695 12.69105 ZT4-7 10.9446 10.9446 10.9446 ZT8-11 6.38063 6.38063 6.38063 ZT12-15 0 0 0 ZT16-19 9.328990000000001 9.328990000000001 9.328990000000001 ZT20-23 12.562249999999999 12.562249999999999 12.562249999999999