Question: Question Eight: [10 marks] Which are the two important aspects of an ETL System? Explain. [2 marks] Which are the two important reasons for doing

Question Eight: [10 marks]

  1. Which are the two important aspects of an ETL System? Explain. [2 marks]
  2. Which are the two important reasons for doing a Cluster Analysis? Explain [3 marks]
  3. What is cluster cohesion and cluster separation? What is its use? [2 marks]
  4. The Centroid for 4 data points was found to be (9,7,6). Given below are three of the 4 points, find the 4th point. Explain. [3 marks]

P1 = (9,8,7)

P2 = (7,6,5)

P3 = (10,8,6)

P4 = (?, ?, ?)

thank you very much <3

ps. the subject is Data managment and analysis

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