Quiz Corrections Process

If you lose points on an in-class quiz (not the final), you have the opportunity to earn back half the lost points through a process called corrections:

• You have one week to complete and turn in test corrections, from the day the quiz is returned.

• You may get help from anyone you want in understanding your mistakes and making the corrections.  (However, make sure you understand errors enough to explain them clearly.  This material will appear again on the Final!)

•  In performing the corrections procedure, you must do the following* for each incorrect question, on a separate sheet of paper:

  • Number the question and write out the correct solution.

  • Write at least two sentences to explain each mistake (write more if necessary to demonstrate your understanding), explaining:

    • (a) what the error was (N.B., if you missed the quiz, e.g., due to illness, cite that as your "error"), and

    • (b) what you needed to do to correct it.

  • Cite the source(s) you used to correct your misunderstandings.  Citation of a person is not enough.  You need to find a "print" source, such as a slide deck from lecture (date of lecture), course text book (initials), piazza post (@number), or a web page (URL).

    • For a slide deck, provide the slide numbers or PDF page numbers, and be clear which it is (slide vs. PDF number), if they are different.

    • For a course text book, provide a page number and be clear what edition you are citing (e.g., online vs. paper), because the page numbering varies.

    • For a Piazza post, if is long, indicate the paragraph(s) that you used.

    • For a web page, cite where in the web page you found it (e.g., a section header, figure caption, or the like).  

  • Show all your work.

• Attach your original quiz at the front, with the correction pages after.

Example of a full correction with explanation and citation of source

Question
Your team of 6 estimated 80 hours of work for the 6 User Stories in your 10-day Sprint, but only completed 4 Stories, 60 hours worth, despite your team putting in the full 80 hours.  What was your Velocity?

Original Answer
4/10 = 2/5 Story/Day

Correction with Explanation
60 hours / 80 hours = 3/4 or 0.75

I thought that Agile Velocity was speed, so I calculated User Stories per day for the Sprint.  However, it is actually Efficiency.  This is calculated as the estimated time for the completed Stories divided by the estimated time for all the Stories in the Sprint.  Source: Day 4 slides, slide #23.

Note: The first two sentences explain the error, and the third sentence explains the correct approach.

*Adapted from Brigid Danziger, "Best Procedure for Test Corrections", Math Giraffe Blog, April 13, 2015.