condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 5.376835 5.376835 5.376835 ZT8-11 10.230295 10.230295 10.230295 ZT12-15 5.3411 5.3411 5.3411 ZT16-19 4.73588 4.73588 4.73588 ZT20-23 5.807449999999999 5.807449999999999 5.807449999999999