Yep, I asked my teacher the same thing - he said ALWAYS use the statistice provided for comparison.
+ HOWEVER, If there are no industry norms added, use the following:
Industry Standards
Current Ratio = 2:1
Expenses Ratio - (As Low as Possible)
Return On Owners Equity - COmpare to a 3-4% Bank savings account.
Debt To Equity Ratio - 1:1 (Solvency).
Accounts REceivable Turnover Ratio, 30 days.