CS 699 - Data Mining

Card Set Information

 Author: Kevinpom ID: 294248 Filename: CS 699 - Data Mining Updated: 2015-01-29 10:44:53 Tags: Data Mining Folders: Description: Data Mining Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user Kevinpom on FreezingBlue Flashcards. What would you like to do?

1. What is a Nominal Attribute?
• Names, things. labels or names
• There is no ordering
• Math is meaningless on these
• However, can determine mode
• Sometimes called categorical
2. What is a binary attribute?
• Only has two values (i.e. male/female, 0/1)
• Symmetric - both values have equal weight.
• Assymetric - - one value is more important
3. What is an Ordinal Attribute?
• Is a meaningful ranking among variables
• i.e. clerk, manager, CEO etc...
• Although there is ordering, distance between ranks is not defined.
4. What is the difference between an Interval scaled and Ratio scaled.
• Interval scaled - do not have a zero
• Ratio scaled - has a true zero
5. What is a discrete variable?
• has a finite or countable amount of possiblilites
• ordinal variables are considered discrete
6. What is a continuous variable?
Has an infinite number of variables
7. What is the formula for variance?
• How spread out the data is
• n= number of values
• xi = each number
8. What is the formula for standard deviation?
\s

What would you like to do?

Home > Flashcards > Print Preview