condition mean min max ZT0-3 13.3021 13.3021 13.3021 ZT4-7 9.898869999999999 9.898869999999999 9.898869999999999 ZT8-11 8.10512 8.10512 8.10512 ZT12-15 6.92006 6.92006 6.92006 ZT16-19 10.7601 10.7601 10.7601 ZT20-23 12.338149999999999 12.338149999999999 12.338149999999999