Data Preprocessing

What does "mean" mean?

• average
• middle
• repeats the most
• variation

What does "mode" mean?

• average
• middle
• repeats the most
• variation

What is a the meaning for "median"?

• fair share
• middle
• repeats the most
• variation

Which is not a data cleaning method?

• Binning

• clustering

• regression

• aggregation

Select normalization methods:

• min-max normalization

• z-score normalization

• decimal scaling normalization

• schema integration

Which of the following are binning types?

• smoothing by bin means

• smoothing by bin median

• smoothing by bin boundaries

• all

PCA full form is

• Principal Component Analysis

• Principal cluster Analysis

• Primary Component Analysis

• Principal Component Attribute

Data Discretization is

• to scale up data

• to convert continuous attribute to discrete attribute

• to convert discrete attribute to continuous attribute

• none

Concept Hierarchy is useful in

• data warehouse

• data normalization

• multiple level of abstraction

• to create histogram

Data Cube is an example of

• data generalization

• data transformation

• data aggregation

• data cleaning