Question: Given the following hypotheses: H 0 : = 400 H 1 : 400 A random sample of 12 observations is selected from a normal population.

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

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