condition mean min max ZT0-3 1.1240809999999999 0.816907 1.431255 ZT4-7 0.834981 0.834981 0.834981 ZT8-11 0.382959 0.382959 0.382959 ZT12-15 0 0 0 ZT16-19 0.702173 0.702173 0.702173 ZT20-23 1.074137 1.074137 1.074137