Given the following hypotheses:

H₀ : = 400

H₁ : 400

A random sample of 12 observations is selected from a normal population. The sample mean was 407 and the sample standard deviation 6. Using the .01 significance level:

a.	State the decision rule. (Negative amount should be indicated by a minus sign. Round your answers to 3 decimal places.)

Reject H₀when the test statistic isOutside/insidethe interval (?, ? ).

b.	Compute the value of the test statistic. (Round your answer to 3 decimal places.)

Value of the test statistic

c.	What is your decision regarding the null hypothesis?
	Reject Do not reject