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(Solved): WPC 300: Quiz 7: Clustering Started: Oct 16  Kept Score:10 out of 10...


Quiz 7: Clustering
Started: Oct 16 
 Kept Score:10 out of 10

Question 1                                                   1 pts
Which of the following is true of hierarchical clustering?

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

 
Question 2                                           1 pts
In the Target story discussed in the lecture, why did Target send the teen daughter maternity ads?

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

 
Question 3                                                             1 pts
Which of the following is a false statement?

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

 
Question 4                                                           1 pts
Which of the following is a step of agglomerative hierarchical clustering?

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


Question 5                                                    1 pts
Which of the following is not an application of clustering analysis?

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

 
Question 6                        1 pts
Which of the following is true about k-means clustering

  • 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 7                        1 pts
Which of the following statements below is false about supervised/unsupervised data analysis?

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


Question 8                             1 pts
In a cluster analysis, the distance between the clusters should be:

  • Even
  • Zero
  • Maximized
  • Minimized

 
Question 9                               1 pts
Which of the following is a definition of distance between two clusters in a complete linkage clustering?

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


Question 10                           1 pts
Which of the following category of data mining you would use for Spam filtering of emails?

  • Heuristics
  • Supervised
  • Both supervised and unsupervised
  • Unsupervised


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