Answer the following statement(s) true (T) or false (F)

1. Data cleaning is most important when downloading secondary data files.
2. Precoding refers to assigning numeric codes to response categories on a survey prior to letting respondents complete the survey.
3. Three features of a shape are important in a univariate distribution: mean, median, and mode.
4. A frequency polygon displays number and percentage of cases per cell in a table.
5. The beginning point of axes on graphs should be zero unless clearly marked.

1. False
2. True
3. False
4. False
5. True