condition mean min max ZT0-3 1.2177138333333335 0.0 3.5207100000000002 ZT4-7 0.6125025 0.6125025 0.6125025 ZT8-11 0.510555 0.510555 0.510555 ZT12-15 0.13173625 0.124604 0.1388685 ZT16-19 0.84822 0.84822 0.84822 ZT20-23 0.5482255 0.5482255 0.5482255