The Jonathan Dolhenty Archive The Radical Academy Main Menu Online Newsletter Academy Updates The M.J. Adler Archive The Dolhenty Archive Adventures in Philosophy Classic Philosophers Philosophical Critiques Philosophy Glossary Philosophy Quotations Philosophy Mini-Courses Thomas Aquinas Introductory Essays Philosophy Resources Politics Resources Religion Resources Education Resources Science Resources The Media Center Better Living Resource Center Business & Finance Resources Search Central Academy Bookstore Academy NewsStand Academy Emporium About the Academy Academy FAQs Ask the Academy Guestbook Academy Forum Calendar of Events Subscribe to Ezine Give Us Feedback Tell A Friend About Us Votecaster Cartoons & Comics Academy Chatroom
Statistical Analysis Select an Archive Category... Fundamentals Metaphysics Epistemology Logic/Statistics Ethics/Morality Current Affairs Main Page & Index
Academy Resources Glossary of Philosophical Terms Timeline of Philosophy A Timeline of American Philosophy Diagram: Development of Philosophic Thought Diagram: Divisions of Philosophy The Philosophy Resource Center The Religion Resource Center Books about Philosophy in The Radical Academy Bookstore Books about Religion in The Radical Academy Bookstore Click Here for New & Used College Textbooks at Discount Prices Click Here for College Education Information & Study Resources Shop Amazon Stores in the Radical Academy Bookstore Magazine Outlet Music Store Classical Music Store Video Store DVD Store Computer Store Camera & Photo Store Computer/Video Games Software Store Musical Instruments Outlet Store Cellular Phones Toys & Games Tools & Hardware Automotive Store Outdoor Living Consumer Electronics Home & Garden Kitchen & Housewares Baby Superstore Apparel & Accessories Gourmet Food Grocery Store Sporting Goods Jewelry & Watches Health & Personal Care Beauty Store		PAGE THREE A Basic Guide to Statistics by Jonathan Dolhenty, Ph.D.   Graphic Representation Graphic representation is often of great help in enabling us to understand the essential features of frequency distributions and in comparing one frequency distribution with another. A graph is a geometrical image of a set of data, a mathematical picture if you will. We can think about a problem in visual terms. Many problems can be reduced to visual form. These visual forms are often presented to us in the media to help us in understanding a set of measurements, a group of statistical data. We will consider here only a few of the more common types of graphic representations. The Histogram The histogram is a graph in which the frequencies are represented by area in the form of bars. The diagram below shows you an example of one such histogram and explains its parts. The Frequency Polygon The frequency polygon is a graph in which the frequencies are represented by straight lines connecting points located above the midpoints of the intervals at heights corresponding to the frequencies. The diagram below shows you an example of one such frequency polygon and explains its parts. The Cumulative Frequency Polygon The drawing of a cumulative frequency polygon differs from that of a frequency polygon in two respects. First, instead of plotting points corresponding to frequencies, we plot points corresponding to cumulative frequencies. Second, instead of plotting points above the midpoint of each interval, we plot our points above the top of the exact limits of the interval. This is done because we want our graph to visually represent the number of observations falling above or below particular values. The diagram below shows you an example of a cumulative frequency polygon and explains its parts. To Page 4 Enrich Your Life With a Philosophy Book... Enrich Your Life With a Philosophy Magazine... Academy Showcase Specials Main Page & Index
-- Top of Page -- [Homepage] [Newsletter] [Search] [Support the Academy] [Link to Us] [Contact the Academy] [Citing Articles from Our Website] [Privacy Policy & Disclaimer] Copyright 1998-99, 2000-01, & 2002-03 by The Radical Academy. All Rights Reserved.