You can regrade a question for a quiz in New Quizzes. Regrading allows you to change the correct answer or point value for a question. The point value can also be changed for individual answers for questions with varied point values.
Regrading only applies to completed submissions. If all students will be affected by the regrade, please wait for all submissions before regrading.
Regrading is not available for Essay or File Upload questions. Only point values can be changed for Categorization questions; correct answers cannot be changed for this question type.