# Resource Library

#### Statistical Topic

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• ### Cartoon: Thomas Jefferson's Motivation

A cartoon to teach ideas of conditional probability. Cartoon by John Landers (www.landers.co.uk) based on an idea from Dennis Pearl (The Ohio State University). Free to use in the classroom and on course web sites.

• ### Cartoon: Correlation Lesson

A cartoon suitable for use in teaching the idea that association does not imply causation. The cartoon is number 552 (March, 2009) from the webcomic series at xkcd.com created by Randall Munroe. Free to use in the classroom and on course web sites under a creative commons attribution-non-commercial 2.5 license. A t-shirt with this cartoon is also available for sale at xkcd.com.

• ### Cartoon: Meaning of Random

A cartoon suitable for use in teaching the difference between how the word random is used in probability compared to some uses in everyday parlance. The cartoon is number 1210 (May, 2013) from the webcomic series at xkcd.com created by Randall Munroe. Free to use in the classroom and on course web sites under a creative commons attribution-non-commercial 2.5 license

• ### STATS: The Magazine for Students of Statistics

STATS magazine contains many articles that may be of interest to students of statistics and educators. Articles vary from those that are meant to teach and inform about different concepts and ideas to those that provide ideas for how to teach important topics to others. Some issues also include interesting data sets and information about ways to become more involved in the greater Statistics community.

• ### How Much is a Fireplace Worth?

This case study starts by the simple comparison of the prices of houses with and without fireplaces and extends the analysis to examine other characteristics of the houses with fireplace that may affect the price as well. The intent is to show the danger of using simple group comparisons to answer a question that involves many variables. The lesson shows the R code for doing this analysis; however, the data and the model could be used with another statistical software.

• ### Statistics: Model Hypothesis Testing for Astronomers

This presentation was given by Aneta Siemiginowska at the 4th International X-ray Astronomy School (2005), held at the Harvard-Smithsonian Center for Astrophysics in Cambridge, MA.

• ### Statistics: Basic Concepts for Astronomers

This presentation was given by Aneta Siemiginowska at the 4th International X-ray Astronomy School (2005), held at the Harvard-Smithsonian Center for Astrophysics in Cambridge, MA.

• ### Probability and Statistics in Aerospace Engineering

This resource was prepared to give the practicing engineer a clear understanding of probability and statistics with special consideration to problems frequently encountered in aerospace engineering. It is conceived to be both a desktop reference and a refresher for aerospace engineers in government and industry. It could also be used as a supplement to standard texts for in-house training courses on the subject.

• ### Introduction to Statistics (NASA Lesson)

These pages explain the following basic statistics concepts: mean, median, mode, variance, standard deviation and correlation coefficient (with example from the Institute on Climate and Planets).

• ### Analysis Tool: Kappa as a Measure of Concordance in Categorical Sorting

Calculates unweighted kappa and kappa with linear and quadratic weightings, along with some other measures of concordance.