condition mean min max ZT0-3 13.072849999999999 11.8389 14.306799999999999 ZT4-7 14.5974 14.5974 14.5974 ZT8-11 16.4595 16.4595 16.4595 ZT12-15 0 0 0 ZT16-19 21.52225 21.52225 21.52225 ZT20-23 16.7549 16.7549 16.7549