condition mean min max ZT0-3 513.45 513.45 513.45 ZT4-7 420.8 420.8 420.8 ZT8-11 407.45000000000005 407.45000000000005 407.45000000000005 ZT12-15 429.9 429.9 429.9 ZT16-19 523.95 523.95 523.95 ZT20-23 500.45000000000005 500.45000000000005 500.45000000000005