Textbook Notes (368,150)
SOAN 2120 (129)
D Walters (55)
Chapter 8

# Chapter 8

2 Pages
98 Views

School
Department
Sociology and Anthropology
Course
SOAN 2120
Professor
D Walters
Semester
Fall

Description
SOAN 2120 Chapter 8 – Analysis of Quantitative Data Dealing with Data 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 1. Code sheet (gather info then transfer it onto grid format) 2. Direct-entry method, including CATI (input information while it is being collected) 3. Optical scan (scantron) 4. Bar code Cleaning Data: verifies the accuracy of coding - 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 Descriptive statistics: numerical data Measures of Central Tendency Mode: nominal, ordinal, interval or ratio data Median: not used at nominal level Mean: most widely used, only used with interval or ratio level data Measures of Variation Zero variation: Percentiles: Standard deviation: “average distance” between all scores and the mean Z-score/standardized score: number of standard deviations from the mean Covariation: things go together or are associated Independence: no association or relationship between variables 3 Techniques help decide whether a relationship exists between two variables 1. Scattergram/plot/graph 2. Cross-tabulation/percentaged table 3. Measures of association/statistical measure that express the amount of covariation by a single number What can you learn from a Scattergram? Form: Independence (no relationship), linear (creates a straight line), curvilinear (U or S curve) Direction: positive or negative Precision: the amount of spread in the points on a graph Bivariate Tables Cross-tabulation: the cases are organized in the table on the basis of two variables at the sa
More Less

Related notes for SOAN 2120
Me

OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Join to view

OR

By registering, I agree to the Terms and Privacy Policies
Just a few more details

So we can recommend you notes for your school.