condition mean min max ZT0-3 12.48161 12.48161 12.48161 ZT4-7 13.239421 13.239421 13.239421 ZT8-11 12.927361000000001 12.927361000000001 12.927361000000001 ZT12-15 12.198708 12.198708 12.198708 ZT16-19 13.140176499999999 13.140176499999999 13.140176499999999 ZT20-23 15.168320999999999 15.168320999999999 15.168320999999999