Segmentation KHT - Machine Learning

Question 1

Which sentence from the following, regarding Segmentation, is CORRECT?

Accepted Answer

The goal is to find natural groups

Answer

The goal is to create some groups

Answer

It is similar to Classification

Answer

It is a supervised task

Question 2

What is the most important validation criterion in Segmentation?

Accepted Answer

Appropriate labels on groups

Answer

Silhouette statistic

Answer

Find segments available and actionable

Answer

Segments size greater than 5%

Question 3

Which, from the following, is something that we don´t decide when running a Segmentation?

Accepted Answer

Segment profiles

Answer

A measure of distance

Answer

Clustering procedure

Answer

Number of clusters

Question 4

Which one from the following is CORRECT regarding Correlation Analysis and Standardization in relation to Segmentation?

Accepted Answer

Standardization is not necessary if all variables have same units

Answer

Both are mandatory always before Segmentation

Answer

Correlation analysis is recommended, but not mandatory

Answer

Both are recommended, but optional

Question 5

Which sentence is FALSE in Segmentation?

Accepted Answer

Clustering variables are not used to calculate profiles

Answer

Silhouette is one of the most important technical criterion

Answer

Silhouette range goes from -1 to 1

Answer

Cluster analysis is not an inference technique

Question 6

Which, from the following, is NOT TRUE regarding K-means?

Accepted Answer

You always decide the measure of distance

Answer

It is valid for large datasets

Answer

You should decide on number of groups

Answer

It is somehow dependent on initial cluster's centers

Question 7

Which one is CORRECT regarding Interactive clustering algorithm in Dataiku?

Accepted Answer

Enables you to impute missing values

Answer

It does not allow the handling of outliers

Answer

Dimension reduction is disabled for this algorithm

Answer

It allows to run it with different values of k (number of groups)

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