condition mean min max ZT0-3 2775.3 2775.3 2775.3 ZT4-7 3398.7 3398.7 3398.7 ZT8-11 3615.55 3615.55 3615.55 ZT12-15 2874.55 2874.55 2874.55 ZT16-19 2042.8999999999999 2042.8999999999999 2042.8999999999999 ZT20-23 1881.3 1881.3 1881.3