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Exam AWS Certified Machine Learning - Specialty All Questions

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Exam AWS Certified Machine Learning - Specialty topic 1 question 102 discussion

A Machine Learning Specialist prepared the following graph displaying the results of k-means for k = [1..10]:

Considering the graph, what is a reasonable selection for the optimal choice of k?

  • A. 1
  • B. 4
  • C. 7
  • D. 10
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Suggested Answer: B 🗳️

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ksrivastavaSumit
Highly Voted 2 years, 7 months ago
B seems correct based on the elbow method
upvoted 16 times
Juka3lj
2 years, 6 months ago
I agree, most likely B.
upvoted 4 times
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exam_prep
Highly Voted 1 year, 11 months ago
Hi all, I am not able to see the image. It is broken for me. Is it possible for someone to share the image.
upvoted 7 times
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endeesa
Most Recent 5 months ago
Selected Answer: B
The closest no.to the elbow is clearly 4
upvoted 2 times
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cyberfriends
6 months ago
Selected Answer: B
B is correct
upvoted 1 times
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Mickey321
8 months ago
Selected Answer: B
Elbow method
upvoted 1 times
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ADVIT
10 months ago
B: https://en.wikipedia.org/wiki/Elbow_method_(clustering)
upvoted 1 times
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Sylzys
1 year, 2 months ago
Selected Answer: B
Elbow is more visible at 4
upvoted 2 times
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rockingkiran
1 year, 4 months ago
Selected Answer: B
B seems correct
upvoted 1 times
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Peeking
1 year, 4 months ago
Selected Answer: B
https://www.analyticsvidhya.com/blog/2021/01/in-depth-intuition-of-k-means-clustering-algorithm-in-machine-learning/
upvoted 2 times
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Skychaser
1 year, 9 months ago
Selected Answer: B
Elbow method
upvoted 2 times
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Sadgamaya
2 years, 1 month ago
. B seems correct.
upvoted 1 times
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mahmoudai
2 years, 5 months ago
B seems better
upvoted 2 times
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Vita_Rasta84444
2 years, 5 months ago
number 4 is the elbow of the hand, B is correct
upvoted 4 times
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cnethers
2 years, 6 months ago
because the elbow method is a heuristic method its open to debate as to where the correct bend in the cluster is. It's a good tool to use with lower computation cost than computing the silhouette score. When looking at https://www.youtube.com/watch?v=qs8nfzUsW5U instead of eyeballing where the bend is, he calculates where the difference between scores is smaller than the 90th persentile
upvoted 2 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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