STAT 119 Chapter Notes - Chapter 2: Mosaic Plot, Bar Chart, Contingency Table
Document Summary
Records the counts for each of the categories of the variable. Some tables report percentages and many report both. Well-designed display will do much of the work of analyzing your data, it can show the important features and patterns. Best way to report to others what you find in your data is with a well-chosen picture. Area principle - area occupied by a part of the graph should correspond to the magnitude of the value it represents. Gives a accurate visual impression of the distribution. Displays the distribution of a categorical variable, showing the counts for each category next to each other for easy comparison. Should have small spaces between the bars to indicate that these are freestanding bars that could be arranged into any order. Relative frequency bar chart - replace the counts with percentages. Shows how a whole group breaks into several categories.
