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Add the following rubric items:

  • Identified that the bounds of the loop are incorrect.
    • grader note: The upper bound specified in range should be 6 to ensure that 5 is included.
    • points: 2
  • Identified that the coefficient of 3 is incorrect.
    • grader note: The coefficient of i should be 2.
    • points: 2

Here's a response that should receive full points:

The upper bound is wrong (the argument to range should be 6) and the coefficient of 3 should be 2.

Here's a response that should receive partial points:

The upper bound is wrong (the argument to range should be 6).

Here's a response that should receive no points:

There are missing parentheses around the number 2.

AI Grading: Using rubrics to grade free response

To compute the mathematical expression:

$$ \sum_{i=0}^{5} 2i^3 $$

You wrote the following Python code:

1
2
3
a = 0
for i in range(5):
    a += 3 * i ** 3

Explain why this code will not work as intended.

Explanation:

Correct answer

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Title:
AI Grading: Using rubrics to grade free response

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Started at:
2026-08-04 22:49:53 (CDT)
Duration:
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