For the same time period last year (note this won't take into account week days etc., so March 28th this year is a Monday - last year it was a Sunday), you would probably want something along the lines of:
IF ([Business Layer Standard].[Claim_Favorites__c].[Date_of_Loss__c]
between _add_years(_add_days(current_date, -8)),-1)
and _add_years(_add_days(current_date,-1),-1)
THEN ([Business Layer Standard].[Claim_Favorites__c].[Status_Count__c])
Else (0)
------------------------------
Chris Turner
------------------------------