COMMERCE 2QA3 Chapter Notes - Chapter 4: Bar Chart, Contingency Table
16 Sep 2016
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Document Summary
Show patterns and features, while also revealing things you did not expect to see: make a picture: the best way to report to others what you find in your data is a well-chosen picture. Frequency table: a table listing the categories in a categorical variable and fives the number of observations for each category. Relative frequency table: a frequency table showing proportions, or percentages instead of numbers. Area principle: the area occupied by apart of the graph should correspond to the magnitude of the value it represents. Bar chart: a chart that represents the count (or percentage) of each category in a categorical variable as a bar, allowing easy visual comparison across categories. Always keep in mind that you need to think before you draw. It is important to know what type of display to use. It is dependent on the type of data you have and what you intend to communicate.
