1. Stating the problem: We need to find the mean (average) of the student quiz scores. 2. Formula: The mean is calculated by summing all the quiz scores and dividing by the number of quizzes. $$\text{Mean} = \frac{\text{Sum of all quiz scores}}{\text{Number of quizzes}}$$ 3. Explanation: To find the mean, add all the quiz scores together to get the total sum. 4. Then, count how many quizzes there are. 5. Finally, divide the total sum by the number of quizzes to get the mean score. Note: Since the quiz scores are not provided, please provide the scores to calculate the mean.