数据挖掘导论课后习题答案-第一章

Introduction

1. Discuss whether or not each of the following activities is adata mining
   task.
   (a) Dividing the customers of a company according to their gender.
   No. This is a simple database query.
   (b) Dividing the customers of a company according to their prof-
   itability.
   No. This is an accounting calculation, followed by the applica-
   tion of a threshold. However, predicting the pro?tability of a new
   customer would be data mining.
   （c）Computing the total sales of a company.
   No. Again, this is simple accounting.
   (d) Sorting a student database based on student identi?cation num-
   bers.
   No. Again, this is a simple database query.
   (e) Predicting the outcomes of tossing a (fair) pair of dice.
   No. Since the die is fair, this is a probability calculation. If the
   die were not fair, and we needed to estimate the probabilities of
   each outcome from the data, then this is