condition mean min max ZT0-3 1611.0 1611.0 1611.0 ZT4-7 2593.6 2593.6 2593.6 ZT8-11 2213.8 2213.8 2213.8 ZT12-15 1767.95 1767.95 1767.95 ZT16-19 1299.15 1299.15 1299.15 ZT20-23 1291.45 1291.45 1291.45