condition mean min max ZT0-3 95.179036 95.179036 95.179036 ZT4-7 154.21993600000002 154.21993600000002 154.21993600000002 ZT8-11 135.147766 135.147766 135.147766 ZT12-15 114.58536649999999 114.58536649999999 114.58536649999999 ZT16-19 106.3250615 106.3250615 106.3250615 ZT20-23 97.5993445 97.5993445 97.5993445