Categorical Data Visualizations F
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Last updated 10:24 PM on 5/30/23
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20 Terms
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What is this?
simple bar chart
2
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What is this?
simple pie charts
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What is this?
stacked bar chart
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What is this?
grouped bar chart
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What is this?
mosaic plot
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What is this?
sankey diagram
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Definition of a simple bar chart
Helps visualize the magnitude for a single set of categories
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Features of a simple pie chart
\-circle split into slices that represent values within a category
\-slices are sized accordingly to the proportion out of the whole the value represents
\-numbers are used to label each slice
\-each of the values are distinct to the case
\-slices are sized accordingly to the proportion out of the whole the value represents
\-numbers are used to label each slice
\-each of the values are distinct to the case
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When to use a stacked bar chart?
Useful when the sum of the bars represents a meaningful amount or count. Also nice for illustrating the relative sizes in a given category
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When to use a bar chart?
\-when there are a lot of values within a category
\-the proportions in the categories are similar
\-we want to compare the proportions of a category across multiple sets
\-the proportions in the categories are similar
\-we want to compare the proportions of a category across multiple sets
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When to use a grouped bar chart?
Easier to see differences between categories. Use when emphasizing differences
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When to use Mosaic Plots?
Helps show relationships and provide a visual way to compare independence between groups.
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Definition of Sankey Diagrams
Illustrates the “flow” from one set of categories to another
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Marginal Probability
Has to do with one**;** ex, the probability of randomly selecting a passenger from first class or survival status __**overall**__
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Joint Probability
Multiple (2 max); ex, the probability that a randomly selected passenger survived __**and**__ was first class
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What graph to use in joint probability
grouped bar chart
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What graph to use in marginal probability
pie chart
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Conditional Probability
the total amount (something like only first class); ex, the probability that a passenger survived __**given**__ that they were in first class
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What graph to use in conditional probability
stacked bar chart
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How to asses independence between two categorical variable via a stacked bar chart or mosaic plot?
Putting two bars next to each other that are different categories; the areas are proportionals to the joint probability of each category
