[LEC2] Data Visualization Flashcards
Methods of Data presentation
Narrative, Tabular & Graphical
The data is presented in anrrative form. This is typically used for small data sets and limited summaries.
Narrative or Textual
Interpreting the data whther in table or in chart or graphs and translate into text.
Narrative
- The simplest method of data presentation
- Can be e used for all numerical data
- It can present trends, comparisons, and interrelationships among different variables.
- A table should be simple, direct and clear.
Tabular
Numbered consecutively
Table Number
- Able to give complete information
- (Who, What, When, Where (4W))
- Clear yet simple
Title
Indicates the basis of classification (Vertical)
Column Headings
Indicates the basis of classification (Horizontal)
Row Classifier
Intersection of a row and column
Body
Should be placed immediately below the button rule of the table
Footnotes
- When the data presented is not original, it is obligatory to specify the source.
- bottom of the table
Source of Data / Source Note
If we fail state our source then its _________
plagiarism
Place it immeditely after the text where it is cited
Positioning
When creating a table it should be ______, _______ and ______
simple, direct and clear
It should be standard
Uniformity
Should be limited
Number of Variables
readers should be able to understand the context without referring to the explanation
Self-Explanatory
Separation of rows and columns within the table
Ruling
Also known as pictorial representations of numerical data.
- It is preferable to deliver a specific message that to present data in a table
- Can show trends or patterns in a large data set
Graphical
o a popular type of graph to present a frequency distribution for nominal or ordinal data
o useful for comparing data between different classifications or categories
Bar Chart/Graph
o commonly used type of graph to portray frequency distribution for discrete or continuous data
o in creating a histogram, determine the scales of axes; vertical scale should always begin in zero; if not, the comparison among intervals may be distorted
Histograms
o similar to histogram
o placing a point at the center of each interval
o points are connected by a straight line
Frequency Polygon
o commonly used type of graph to portray frequency distribution for a discrete or continuous data
o uses a single axis to display selected summaries of measurements
Box Plots
o used to portray the relationship between two different continuous data
o each point on the graph represents a pair of value
o scales are positioned in horizontal and vertical axis
Two-way Scatter Plots
o used to illustrate the relationship between continuous quantities
o points in horizontal axis have a single corresponding measurement on the vertical axis
o adjacent points are connected by a straight line
o in the horizontal axis, mostly represents time
o intended to portray trends
Line Graph
▪ display the data into groups
▪ shows how many data occur in each group
▪ used to group a large data set
▪ variables (data) summarized into tables
Frequency Distribution
Categories of Data Visualization
▪ Relationship
▪ Composition
▪ Distribution
▪ Comparison
