condition mean min max ZT0-3 12.322697 12.322697 12.322697 ZT4-7 11.897082000000001 11.897082000000001 11.897082000000001 ZT8-11 12.620099 12.620099 12.620099 ZT12-15 11.745116 11.745116 11.745116 ZT16-19 14.0336885 14.0336885 14.0336885 ZT20-23 13.609532 13.609532 13.609532