condition mean min max ZT0-3 319.29999999999995 319.29999999999995 319.29999999999995 ZT4-7 427.8 427.8 427.8 ZT8-11 395.05 395.05 395.05 ZT12-15 420.95000000000005 420.95000000000005 420.95000000000005 ZT16-19 482.25 482.25 482.25 ZT20-23 294.85 294.85 294.85