Bar+Graphs+with+Nominal+Data

Nominal Data Examples, Plots and Analysis
Let’s start with the easiest one to understand. Nominal scales are used for labeling variables, without any quantitative value. “Nominal” scales could simply be called “labels.” Here are some examples, below. Notice that all of these scales are mutually exclusive (no overlap) and none of them have any numerical significance. A good way to remember all of this is that “nominal” sounds a lot like “name” and nominal scales are kind of like “names” or labels. Source: []

Example: Titanic - TinkerPlots Data Set

**Context - Always know the context/origin of your data set!** This data set contains four numeric attributes. Fate of the 2201 passengers on the Titanic's maiden voyage. The ship, en route to New York City from Southampton, England, sank on April 14–15, 1912 after colliding with an iceburg about 400 miles south of Newfoundland. - Gender: Gender of person Class: The class the person was traveling in (1-3) or crew member (crew) Age: Adult or child Survived: Whether the person survived or not - Downloaded September, 2004, from: www.amstat.org/publications/jse/jse_data_archive.htm and submitted to them by Robert Dawson, Department of Mathematics and Computing Science, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, CANADA Original source: "Report on the Loss of the `Titanic' (S.S.)" (1990), British Board of Trade Inquiry Report (reprint), Gloucester, UK: Allan Sutton Publishing.
 * Attribute Description **


 * Case Cards **

Class Bar Graph
Shown in decreasing order from left to right with icons set to “Fuse Rectangular.” Drag the name right or left to reorder. The Key is shown. Analysis //TBA//

Gender Bar Graph
Shown in decreasing order from left to right with icons set to “Fuse Rectangular.” Drag the name right or left to reorder. The Key is shown. Analysis //TBA//

Bar Graph for Survived with Gender attribute as an overlay
Graph Survived - Drag Gender to the middle of the plot - Select Order Analysis //TBA//

Create an appropriate plot and answer the following questions.

1. Overall, what percentage of the passengers and crew survived? // The stacked bar graph shows ... //

2. In loading people into life boats, the rule was supposedly "women and children first." How well does it appear that this rule was followed?

Instead of using a stacked bar graph you may create a two-way table. Note that this is NOT a dot plot. Show Cell Percent was used so the values sum to 100%.

//The two way table shows ...//

3. How did the class that people were traveling in affect their chance of surviving?

The stacked bar graph shows ...