
Learning Objective:
What are Attribute Classes?
What are Attribute Frequencies?
What are Contingency Table?
Concepts
Attributes can be Positive or Negative.
Positive Attributes can be represented by "A", "B", "C"....
Negative Attributes can be represented by "α", "β", "γ"....
Attributes themselves represent a Group. Such groups can be termed as "Classes"
Positive Attributes can have Positive Frequencies and Negative Attributes can have Negative Frequencies.
Invalid classes can be "A" and "α"; "B" and "β"; "C" and "γ"
Relationship of Frequency can be studied in the Contingency Table.
Contingency Table can be for 2 OR 3 Attributes.
Contingency Table for 2 Attributes is also termed as 9 Square Table or 2 x 2 Table.