SOAN 2120 Chapter Notes - Chapter 8: Scatter Plot, Karl Pearson, Dependent And Independent Variables
4 Nov 2012
School
Department
Course
Professor
Document Summary
Coding data: systematically reorganizing raw numerical data into a format that is easy to analyze using computers. Codebook: document describing the coding procedure and the location of data for variables in a format that computers can use. Precoding: placing the code categories on the questionnaire. 4 ways to get raw quantitative data into a computer: code sheet (gather info then transfer it onto grid format, direct-entry method, including cati (input information while it is being collected, optical scan (scantron, bar code. Possible code cleaning/wild code checking: checking for impossible codes (f= 1, m=2 and you find a 4 in the data) Contingency cleaning/consistency checking: cross-classifying 2 variables and looking for logically impossible combinations (education cross-classified by occupation. Grade 8 failure recorded as legitimate medical doctor= coding error) Statistics: ways to manipulate numbers that represent data from a research project. Mean: most widely used, only used with interval or ratio level data.
