condition mean min max ZT0-3 1.2459 1.2459 1.2459 ZT4-7 0.9889355 0.9889355 0.9889355 ZT8-11 1.3635 1.3635 1.3635 ZT12-15 1.12897 1.12897 1.12897 ZT16-19 1.581245 1.581245 1.581245 ZT20-23 1.199605 1.199605 1.199605