Question

a brewery claims that the mean amount of beer in their bottles is at least 12 oun test for this claim is left - tailed, right - tailed, or two - tailed.
a. two - tailed
b. left - tailed
c. right - tailed

Explanation:

In hypothesis testing, the type of tail is determined by the alternative hypothesis. The brewery claims the mean is at least 12 ounces. The null hypothesis \(H_0:\mu\geq12\) and the alternative hypothesis \(H_1:\mu < 12\) (since we test against the claim). A left - tailed test is used when the alternative hypothesis has a less - than (\(<\)) sign.

Answer:

B. left - tailed