Suppose a mutual fund qualifies as having moderate risk if the standard deviation of its monthly rate of return is less than 6%. Amutual-fund rating agency randomly selects 27 months and determines the rate of return for a certain fund. The standard deviation of the rate of return is computed to be 4.33%. Is there sufficient evidence to conclude that the fund has moderate risk at the =0.05 level ofsignificance? A normal probability plot indicates that the monthly rates of return are normally distributed.

Identify the criticalvalue(s) for this test.