condition mean min max ZT0-3 0.2033385 0.2033385 0.2033385 ZT4-7 0.27834349999999997 0.27834349999999997 0.27834349999999997 ZT8-11 0.2174165 0.2174165 0.2174165 ZT12-15 0.1545521 0.1545521 0.1545521 ZT16-19 0.46369150000000003 0.46369150000000003 0.46369150000000003 ZT20-23 0.3185555 0.3185555 0.3185555