Data Mining

1. Identify at least two advantages and two disadvantages of using color to visually represent information.

2.  Discuss the advantages and disadvantages of using sampling to reduce the number of data objects that need to be displayed. Would simple random sampling (without replacement) be a good approach to sampling? Why or why not?

3.  Describe one advantage and one disadvantage of a stem and leaf plot with respect to a standard histogram. 

4. Describe the types of situations that produce sparse or dense data cubes. Illustrate with examples other than those used in the book.