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How do you visualize an association between two categorical variables?
To study the relationship between two variables, a comparative bar graph will show associations between categorical variables while a scatterplot illustrates associations for measurement variables.
What type of table should you use to examine the relationship between categorical variables?
A chi-square test is used when you want to see if there is a relationship between two categorical variables. In SPSS, the chisq option is used on the statistics subcommand of the crosstabs command to obtain the test statistic and its associated p-value.
Which is an example of a visual representation?
Frequency tables, pie charts, and bar charts can all be used to display data concerning one categorical (i.e., nominal- or ordinal-level) variable. Below are descriptions for each along with some examples.
How are two categorical variables represented in a contingency table?
A two-way contingency table, also know as a two-way table or just contingency table, displays data from two categorical variables. This is similar to the frequency tables we saw in the last lesson, but with two dimensions. One variable will be represented in the rows and a second variable will be represented in the columns.
How does a pie chart represent a categorical variable?
A pie chart displays data concerning one categorical variable by partitioning a circle into “slices” that represent the proportion in each category. When constructing a pie chart, pay special attention to the colors being used to ensure that it is accessible to individuals with different types of colorblindness.
How are two categorical variables represented in a stacked bar chart?
A stacked bar chart is also known as a segmented bar chart. One categorical variable is represented on the x-axis and the second categorical variable is displayed as different parts (i.e., segments) of each bar. Minitab Express cannot be used to construct stacked bar charts, however many other software programs will.
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