A Data Quality Control Program for Computer-Assisted Personal Interviews

Figure 3

Skewness by item for all provinces (July 16th, 2009–November 23rd, 2009). Comment presented in the report: The skewness graph indicates if the answers to any item are skewed or not. Negative is left skewed (tend to have small values) and positive is right skewed (tend to have large values). In the skewness it shows that there is no significant difference among all three provinces.