condition mean min max ZT0-3 129.525 113.5475 145.5025 ZT4-7 174.1395 174.1395 174.1395 ZT8-11 266.938 266.938 266.938 ZT12-15 0 0 0 ZT16-19 278.476 278.476 278.476 ZT20-23 213.857 213.857 213.857