Home » Microsoft » DP-100 v.2 » You need to select a feature extraction method.
You need to select a feature extraction method.
Which method should you use?
A. Mutual information
B. Mood’s median test
C. Kendall correlation
D. Permutation Feature Importance
Correct Answer: C
Explanation/Reference:
In statistics, the Kendall rank correlation coefficient, commonly referred to as Kendall’s tau coefficient (after the Greek letter), is a statistic used to measure the ordinal association between two measured quantities.It is a supported method of the Azure Machine Learning Feature selection.
Note: Both Spearman’s and Kendall’s can be formulated as special cases of a more general correlation coefficient, and they are both appropriate in this scenario.Scenario: The MedianValue and AvgRoomsInHouse columns both hold data in numeric format. You need to select a feature selection algorithm to analyze the relationship between the two columns in more detail.
References: https://docs.microsoft.com/en-us/azure/machine-learning/studio-module-reference/feature-selection-modules