# Class 08: Topic 7: Displaying and Describing Distributions

Back to Topic 6: Two-Way Tables. On to Topic 8: Measures of Center.

This outline is also available in PDF.

Held: Friday, 8 February 2008

Summary: We consider some techniques for describing and visualizing a quantitative variable.

Notes:

• Homework for Monday: Activities 6-26, 6-30, 7-8, 7-12.
• Also prepare topic 8.
• Advance notice: Our first exam will be on February 20. We'll have a review day on February 18.
• Preparation: Overview and Preliminaries for Topic 7.
• Handouts: R notes on activity 7-5.
• Due: Activities 6-6, 6-10, 6-26, 6-30 [cancelled].

Overview:

• Reporting on quantitative variables.
• Group activity: The Matching Game.
• Topic 7.
• Computer activity: Histograms.

## Preliminaries

• Context: We are considering the ways to describe and illustrate different kinds of data.
• Yesterday, we considered ways to examine pairs of categorical variables (one explanatory, one response).
• Today, we look at a different kind of data: Collections of quantitative data for a single variable.
• You've seen one way to view such collections: Dot plots.
• We consider two more visualizations: Histograms and Stem Plots
• We also consider some language for talking about distributions.

## Matching Game

• We'll pause after fifteen minutes or so to go over your answers to the matching game.

## Histograms

• We'll stop when there are fifteen or twenty minutes left to jump to activity 7-5.

Back to Topic 6: Two-Way Tables. On to Topic 8: Measures of Center.

Disclaimer: I usually create these pages on the fly, which means that I rarely proofread them and they may contain bad grammar and incorrect details. It also means that I tend to update them regularly (see the history for more details). Feel free to contact me with any suggestions for changes.

This document was generated by Siteweaver on Fri May 2 13:40:52 2008.
The source to the document was last modified on Sun Feb 10 18:08:27 2008.
This document may be found at `http://www.cs.grinnell.edu/~rebelsky/Courses/MAT115/2008S/Outlines/outline.08.html`.

You may wish to validate this document's HTML ; ;

Samuel A. Rebelsky, rebelsky@grinnell.edu

Copyright © 2008 Samuel A. Rebelsky. This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License. To view a copy of this license, visit `http://creativecommons.org/licenses/by-nc/2.5/` or send a letter to Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 94105, USA.