1. What is Grade Curving Based on Average?

Grade curving based on average adjusts all scores by the difference between the desired average and the actual average. This method maintains the distribution of scores while shifting them to achieve a target average.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( \text{original} \) — The student's original score
• \( \text{desired avg} \) — The target average for the class
• \( \text{actual avg} \) — The actual average of the class

Explanation: This method adds the same amount to each student's score, which is the difference between the desired average and the actual average.

3. Importance of Grade Curving

Details: Grade curving can help adjust for exams that were unexpectedly difficult or easy, ensuring fair grading across different test versions or semesters.

4. Using the Calculator

Tips: Enter the original score, the actual class average, and the desired class average. All values must be non-negative numbers.

5. Frequently Asked Questions (FAQ)

Q1: When should I use this type of curve?
A: This method is best when you want to maintain the score distribution while adjusting the overall performance level of the class.

Q2: Does this method change the ranking of students?
A: No, since the same value is added to all scores, the relative ranking of students remains unchanged.

Q3: What if the curved score goes above the maximum possible score?
A: You may need to cap scores at the maximum possible value or consider a different curving method.

Q4: Are there alternatives to this curving method?
A: Yes, other methods include percentile-based curves or square root curves that adjust scores non-linearly.

Q5: How does this affect the standard deviation?
A: This method preserves the standard deviation of the scores since it's a linear transformation.