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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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