Step 1 :The statement represents a claim. Write its complement and state which is $H_{0}$ and which is $H_{A}$. The claim is that $\mu=8.3$.
Step 2 :The null hypothesis ($H_{0}$) is usually a statement of no effect or no difference. It is the hypothesis that the researcher is trying to disprove.
Step 3 :The alternative hypothesis ($H_{A}$) is a statement that contradicts the null hypothesis. It is what the researcher believes to be true and is trying to prove.
Step 4 :In this case, the claim is that $\mu=8.3$. This would be our null hypothesis.
Step 5 :The complement of this claim, which would be our alternative hypothesis, is that $\mu \neq 8.3$.
Step 6 :Final Answer: \(\boxed{A. H_{0}: \mu=8.3 \text{ (claim); } H_{a}: \mu \neq 8.3}\)