condition mean min max ZT0-3 21.8285 21.53505 22.12195 ZT4-7 1.2956050000000001 1.2956050000000001 1.2956050000000001 ZT8-11 4.669785 4.669785 4.669785 ZT12-15 0 0 0 ZT16-19 15.9613 15.9613 15.9613 ZT20-23 4.72692 4.72692 4.72692