condition mean min max ZT0-3 5.549927500000001 5.076035 6.023820000000001 ZT4-7 5.14157 5.14157 5.14157 ZT8-11 6.598555 6.598555 6.598555 ZT12-15 0 0 0 ZT16-19 8.69259 8.69259 8.69259 ZT20-23 8.64617 8.64617 8.64617