Statistics are used to
- Describe data
- Make inferences about population
- Once statistics are in, it is helpful to construct frequency distribution
- There are different ways to graph data
- Pie chart good for nominal data with limited number of scores
- Bar graphs are used for nominal or ordinal data, with height of bar representing frequency (categorical)
- Frequency polygon for internal and ratio-scale data
- Histogram uses bars to display internal and ratio-scale data since scale values are continuous
- Can see where or how people responded and can see outliers
- Not how we present findings in psychology – avoid frequency distributions in lab reports
0 Responses to “Describing Data”