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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 13 discussion

The displayed graph is from a forecasting model for testing a time series.

Considering the graph only, which conclusion should a Machine Learning Specialist make about the behavior of the model?

  • A. The model predicts both the trend and the seasonality well
  • B. The model predicts the trend well, but not the seasonality.
  • C. The model predicts the seasonality well, but not the trend.
  • D. The model does not predict the trend or the seasonality well.
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Suggested Answer: A 🗳️

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jeetss1
Highly Voted 3 years ago
A is correct answer. Please Refer: https://machinelearningmastery.com/decompose-time-series-data-trend-seasonality/
upvoted 16 times
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Dr_Kiko
Highly Voted 2 years, 11 months ago
A; the problem is bias, not trends
upvoted 8 times
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apache007
Most Recent 2 weeks, 6 days ago
Selected Answer: B
B. The model predicts the trend well, but not the seasonality. Here's what we can observe: The predicted mean line closely follows the general upward trend of the observed line. The predicted mean line does not capture the high frequency up and down changes of the observed line.
upvoted 1 times
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VR10
8 months ago
agreed, this seems to be A. there is similarity between the blue and green lines as far as capturing trend and seasonality is concerned. It just seems that if assumption is that the model is a linear regression model then just the intercept is off by a few units.
upvoted 2 times
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Mickey321
1 year, 2 months ago
Selected Answer: A
A. The model predicts both the trend and the seasonality well
upvoted 1 times
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Valcilio
1 year, 7 months ago
Selected Answer: A
The problem is Bias not trends or sesonality!
upvoted 2 times
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spamicho
2 years, 11 months ago
A is right, both trend (rising) and seasonality is there
upvoted 3 times
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btsql
3 years ago
C is correct answer
upvoted 1 times
btsql
2 years, 12 months ago
A is correct answer. Not C
upvoted 2 times
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Kuntazulu
3 years ago
The trend is up, so isn’t it correctly predicted? And the seasonality is also in sync, the amplitude is wrong.
upvoted 3 times
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georschi
3 years ago
A is right. trend and seasonality are fine, level is the one the model gets wrong
upvoted 4 times
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Should be C
upvoted 1 times
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ashlash
3 years, 1 month ago
Should be A
upvoted 2 times
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A (35%)
C (25%)
B (20%)
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