Your company manages a video sharing website where users can watch and upload videos. You need to create an ML model to predict which newly uploaded videos will be the most popular so that those videos can be prioritized on your company's website. Which result should you use to determine whether the model is successful?
The model should predict 95% of the most popular videos measured by watch time within 30 days of being uploaded. Watch time is a critical metric for measuring the popularity and engagement of videos, as it reflects how long users are spending watching the content. Predicting based on watch time ensures that the model identifies videos that genuinely capture viewers' interest, rather than just generating clicks.
Ans: C (See https://developers.google.com/machine-learning/problem-framing/framing#quantify-it; though it's just an example.) (A) The absolute number of likes shouldn't be used because no information about subscribers or visits to the website is provided. The number may vary. (B) Clickbait videos are a subset of uploaded videos. Using them is an improper criterion. (D) The coefficient should reach 1. (Ref:https://arxiv.org/pdf/1510.06223.pdf)
Thanks for the detailed unswer and reference!
ANS: C D is wrong. Pearson's Correlation Coefficient is a linear correlation coefficient that returns a value of between -1 and +1. A -1 means there is a strong negative correlation +1 means that there is a strong positive correlation 0 means that there is no correlation
ans: C In this type of questions, I think a good idea is trying to copy already existing solutions. For this case, YouTube cares a lot about watchtime. In a previous question, Amazon implemented "Usually buy together" for maximizing profit.
watch time among all other options is the most KPI to rely on
C looks correct.
I think this is B. The question specifies "popular" and also that "newly uploaded" videos need prioritising. C is therefore wrong because you don't have that metric until 30 days has passed from upload time. "Click through rate" is one measure of popularity, so it fits, and is instant.
Must be C
Went with C
C) Watch time