condition mean min max ZT0-3 1.4736090000000002 1.367243 1.5799750000000001 ZT4-7 1.476345 1.476345 1.476345 ZT8-11 0.9717955 0.9717955 0.9717955 ZT12-15 0 0 0 ZT16-19 1.2640795 1.2640795 1.2640795 ZT20-23 1.72801 1.72801 1.72801