condition mean min max ZT0-3 0.09877968150000001 0.055982582999999995 0.14157678 ZT4-7 0.6679339735000001 0.3610930795 0.9747748675 ZT8-11 1.7241261295 1.5182989775000002 1.9299532815 ZT12-15 3.00203263775 2.3713792435 3.632686032 ZT16-19 2.2567369655 2.2263612569999998 2.2871126740000003 ZT20-23 2.8036968042500003 2.640252599 2.9671410095