condition mean min max ZT0-3 10.023763 10.023763 10.023763 ZT4-7 10.056553000000001 10.056553000000001 10.056553000000001 ZT8-11 10.848567 10.848567 10.848567 ZT12-15 12.6264735 12.6264735 12.6264735 ZT16-19 11.6029935 11.6029935 11.6029935 ZT20-23 10.4630215 10.4630215 10.4630215