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(Solved): WPC300 Quiz 7: Clustering UPDATED: Feb  2021...


WPC300 Quiz 7: Clustering

Started: Feb  2021

Quiz Instructions

Question 1        1 pts

Which of the following is a step of agglomerative hierarchical clustering?

Group of answer choices

  • By separating cluster into two finer groups
  • By joining two clusters that not at a Euclidean distance
  • By joining two clusters that are closest to each other
  • By joining two clusters farthest away from each other 

Question 2        1 pts

Which of the following is true about k-means clustering

Group of answer choices

  • The cluster analysis will give us an optimum value for k
  • We choose the value for k before doing the clustering analysis
  • A tree diagram is used to illustrate the steps in the clustering analysis
  • It is a type of hierarchical clustering

Question 3        1 pts

Which of the following is true of hierarchical clustering?

Group of answer choices

  • All clusters must have the same number of data
  • All clusters must have more than one object in it
  • No single cluster can have all data
  • The data partition does not occur in a single step

Question 4        1 pts

In a cluster analysis, the distance between the clusters should be:

Group of answer choices

  • Minimized
  • Even
  • Maximized
  • Zero

 Question 5        1 pts

Which of the following is not an application of clustering analysis?

Group of answer choices

  • Crime prediction analysis
  • Web click stream analysis
  • Market segmentation analysis
  • Collaborating filtering analysis

 Question 6        1 pts

In the Target story discussed in the lecture, why did Target send the teen daughter maternity ads?

Group of answer choices

  • Target analytic model confused her with an older woman with a similar name
  • Target was using special promotion that targeted all teens in her geographical area
  • Target analytics model suggested she was pregnant based on her buying habit
  • Target was sending ads to all women in a particular neighborhood

Question 7        1 pts

Which of the following category of data mining you would use for Spam filtering of emails?

Group of answer choices

  • Supervised
  • Unsupervised
  • Heuristics
  • Both supervised and unsupervised

Question 8        1 pts

Which of the following statements below is false about supervised/unsupervised data analysis?

Group of answer choices

  • The data is not labeled for unsupervised
  • Data is not labeled for supervised analysis
  • For unsupervised analysis, the goal is to find cases that are similar to each other
  • The data is labeled for supervised analysis

Question 9        1 pts

Which of the following is a false statement?

Group of answer choices

  • The k-means algorithm is a method for doing partitional clustering
  • Reducing SSE (sum of squared error) within cluster increases cohesion
  • To predict sales from transactional data one should perform clustering analysis.
  • In the cluster analysis, the objects within clusters should exhibit an high amount of similarity

Question 10     1 pts

Which of the following is a definition of distance between two clusters in a complete linkage clustering?

Group of answer choices

  • The sum of square of the distance between clusters
  • The distance between the least distant pair of objects, one from each group
  • The distance between the most distant pair of objects, one from each group
  • The average of distance between all pairs of objects, where each pair is made up of one object from each group

 



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