Judges in federal appellate courts determine whether a case should be heard in federal court. a defendant is innocent or guilty. a lower court made an error in a case. a case should go to the supreme court.

The correct answer is that they determine whether a lower court made an error in a case, so the third option.  The federal appellate courts are considered one of the most powerful and influential courts as they can set precedents that can affect the lives of millions of Americans.

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