Attribute Types Nominal: categories, states, or names of things Hair-color=auburn, black, blond, brown, grey red, white marital status, occupation id numbers, zip codes Bina Nominal attribute with only 2 states(0 and 1) Symmetric binary: both outcomes equally important e.g. gender Asymmetric binary: outcomes not equally important e.g. medical test(positive Vs. negative Convention: assign 1 to most important outcome(e.g. HIV positive Ordinal Values have a meaningful order (ranking but magnitude between successive values is not known Size=tsmall, medium, large,, grades army rankings7 Attribute Types ◼ Nominal: categories, states, or “names of things” ◼ Hair_color = {auburn, black, blond, brown, grey, red, white} ◼ marital status, occupation, ID numbers, zip codes ◼ Binary ◼ Nominal attribute with only 2 states (0 and 1) ◼ Symmetric binary: both outcomes equally important ◼ e.g., gender ◼ Asymmetric binary: outcomes not equally important. ◼ e.g., medical test (positive vs. negative) ◼ Convention: assign 1 to most important outcome (e.g., HIV positive) ◼ Ordinal ◼ Values have a meaningful order (ranking) but magnitude between successive values is not known. ◼ Size = {small, medium, large}, grades, army rankings