Answer: the answer is TRUE
Explanation: In the United States, federal courts have jurisdiction over cases involving federal law. The circuit courts of appeals, including the 9th Circuit Court of Appeals, are federal courts that hear appeals from the district courts within their jurisdiction. When a state court judge in Arizona is faced with a question of federal law, they are bound by the precedent established by federal judges on the 9th Circuit Court of Appeals. Precedent refers to previous court decisions that serve as a guide or rule for future cases with similar legal issues. This means that the state court judge must follow the interpretations and rulings made by the 9th Circuit Court of Appeals when deciding cases involving federal law within their jurisdiction. The principle of following precedent helps to ensure consistency and uniformity in the application of federal law across different courts. It is important to note that state court judges are not bound by the precedent set by other circuit courts of appeals. However, they may still consider the reasoning and persuasive value of decisions from other circuits when making their own rulings.