condition mean min max ZT0-3 13.079799999999999 12.9178 13.2418 ZT4-7 11.795449999999999 11.795449999999999 11.795449999999999 ZT8-11 9.365604999999999 9.365604999999999 9.365604999999999 ZT12-15 0 0 0 ZT16-19 12.54465 12.54465 12.54465 ZT20-23 14.321950000000001 14.321950000000001 14.321950000000001