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Microsoft

DP-100 · Question #74

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might…

The correct answer is B. No. The question asks if Principal Components Analysis (PCA) sampling mode is an appropriate strategy to compensate for class imbalance in a training set.

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Question

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution. After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen. You are creating a new experiment in Azure Machine Learning Studio. One class has a much smaller number of observations than tin- other classes in the training set. You need to select an appropriate data sampling strategy to compensate for the class imbalance. Solution: You use the Principal Components Analysis (PCA) sampling mode. Does the solution meet the goal?

Options

  • AYes
  • BNo

How the community answered

(37 responses)
  • A
    19% (7)
  • B
    81% (30)

Why each option

The question asks if Principal Components Analysis (PCA) sampling mode is an appropriate strategy to compensate for class imbalance in a training set.

AYes

PCA is a dimensionality reduction technique and does not address class imbalance by sampling or modifying class distributions.

BNoCorrect

No - Principal Components Analysis (PCA) is a dimensionality reduction technique used to transform a large set of variables into a smaller, more manageable set, not a data sampling strategy for addressing class imbalance. PCA does not directly adjust the number of observations per class.

Concept tested: Class imbalance compensation methods

Source: https://learn.microsoft.com/en-us/azure/machine-learning/component-reference/principal-component-analysis

Topics

#Class Imbalance#Data Sampling#Principal Components Analysis#Azure Machine Learning

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