How to get the last 7 days values of a datefield in sql server 2005?

Here is the last 7 days values query without including their time ---

report_mstr = table name

modified_date = datefield

select * from report_mstr 

where (convert(varchar(10),modified_date,120)
between convert(varchar(10),(getdate()-6),120) and convert(varchar(10),getdate(),120))
order by modified_date desc;

 --------

select getdate();

->>>> 2012-07-11 15:41:31.547

select getdate()-6; 

->>>>  2012-07-05 15:40:20.983

select convert(varchar(10),getdate(),120);

->>>> 2012-07-11