Attribute Types Nominal: categories, states or " names of things Hair color=auburn, black blond, brown, grey red whitey marital status, occupation, ID numbers zip codes Bina iry 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 rankings6 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