This document contains comprehensive notes from Lecture 15 of the CO2412 course on Computational Thinking. The lecture focuses on the importance of organizing and presenting data graphically, which is essential for making raw data more interpretable and actionable. The notes cover various technique...
Organizing and Presenting Data Graphically
1. Importance of Data Organization
o Raw data is often difficult to interpret and analyze directly,
necessitating the need for proper organization into tables or graphs.
o Techniques covered include bar charts, pie charts, ordered arrays,
stem-and-leaf displays, frequency distributions, histograms,
polygons, contingency tables, and scatter diagrams.
Variables in Data
1. Definition of a Variable
o A variable is a characteristic that can change over time or vary
between individuals or objects.
o Examples: Hair color, white blood cell count, or the time to failure
of a computer component.
2. Types of Variables
o Quantitative: Variables that are numeric and can be measured.
o Qualitative: Variables that describe qualities or categories.
o Discrete: Variables that take specific values.
o Continuous: Variables that can take any value within a range.
Tables and Charts for Categorical Data
1. Categorical Data
o Categorical data represents categories or groups.
o Common graphical representations include pie charts and bar
charts.
2. Graphing Categorical Data
o Pie Charts: Show the percentage distribution of categories.
o Bar Charts: Represent the frequency or percentage of categories
through the height of bars.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BpoBpo. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $4.52. You're not tied to anything after your purchase.
