condition mean min max ZT0-3 16.0328 15.1025 16.9631 ZT4-7 11.089465 11.089465 11.089465 ZT8-11 12.2075 12.2075 12.2075 ZT12-15 0 0 0 ZT16-19 22.21185 22.21185 22.21185 ZT20-23 18.16275 18.16275 18.16275