Quiz 3 Viterbi matrix

Quiz 3 Viterbi matrix

by Francesco La Rosa -
Number of replies: 2

Now that the points are out, I can see that I misinterpreted the matrix. I understand why that happened, but with the limited time in the quiz and other questions also requiring calculations, staking around 9 points on understanding a matrix seems excessive. I approached the question by quickly referring to what we did in the lecture, such as calculating P(V|N) by looking first at row V and then column N. Now I realize that the row doesn’t add up to 1, which affected my answer for each question, resulting in 0 points despite correctly executing the Viterbi algorithm.

I have also a question: if someone scores less than 16.5 points, is the quiz considered as 0%?



In reply to Francesco La Rosa

Re: Quiz 3 Viterbi matrix

by Jean-Cédric Chappelier -
1. I'm sorry but at this point in the semester, after so many weeks on probabilities (and also so many warnings/explanations about it, e.g. in my reviews/hands-on or even in hands-on solutions (e.g. week 6 question I)), this kind of mistake cannot be accepted anymore, the more so as that here you have to draw the lattice, the sum of outgoing arcs could NOT be bigger than 1... [ And BTW in the question you had, the rows DO INDEED sum up to 1 each ]

2. why would it be? you keep all your points up to the end. The final grade is the weighted sum of all your relative grades, i.e. weighted sum of each of your total of points divided by each maximum (30 points for quizzes)
In reply to Jean-Cédric Chappelier

Re: Quiz 3 Viterbi matrix

by Francesco La Rosa -
1. Okay, I understand that this is a crucial concept, and I’ll be more cautious about it (especially since I made a mistake). My main point was that, in a timed quiz, it’s easy to make a mistake like this and fail on subsequent questions since they’re related.
2. Since in the quiz it says Grade to pass: 16.50 out of 30.00. Glad to know that this is not the case.
Thank you for your feedback.