Solution-For a random sample of 12 observations the sample

Given the following hypotheses:

H0: μ = 400
H1: μ ≠ 400

For a random sample of 12 observations, the sample mean was 407 and the sample standard deviation 6. Using the .01 significance rule.

a. State the decision rule.

b. Compute the value of the test statistic.

c. What is your decision regarding the null hypothesis?

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