C743 data mining 1 - Study guides, Class notes & Summaries

Types of Data Mining correct answersDescriptive (exploratory) Predictive (Explanatory) Text Phases of Data Mining correct answers1) define aims 2) list existing data 3) collect data 4) explore and prepare data 5) segment pop 6) draw up and validate predictive models 7) deploy Models 8) train Model users 9) monitor models 10) enrich Models Data Preparation Functions correct answers- Longest stage of data study. Done to decrease workload and increase efficiency of statistical anal...

Cramer V Test - Used to indicate how strongly associated two different categorical/nominal variables are with each other. - Based on Pearson Chi-Square statistic - Test is performed on contingency tables - Cramer's V value is between 0 & 1. - Values closer to 0 indicate little association between variables. - Values closer to 1 indicated strong association between variables. - In 2x2 contingency table, Cramer's V = Phi coefficient - Can be used on tables with size > 2x2 (i.e. 3x3, 3...