condition mean min max ZT0-3 14.8865 14.8865 14.8865 ZT4-7 12.62455 12.62455 12.62455 ZT8-11 10.761849999999999 10.761849999999999 10.761849999999999 ZT12-15 12.3715 12.3715 12.3715 ZT16-19 14.8166 14.8166 14.8166 ZT20-23 13.8369 13.8369 13.8369