# Collection

• ### Statistics at Square One: Correlation and Regression

This section of an online textbook discusses the correlation coefficient and illustrated it visually through graphs. It explains calculations as well as how scatter plots can describe data. It covers significance tests for relationships, the Spearman rank correlation and the regression equation. Exercises and answers are included.
• ### Pseudo-Random Numbers and Wireless Signals - Why Cell Phone Are hard to Tap

This page provides an example of pseudo random number generators (PRNG) creating spread spectrum broadcasts and signals for encryption and decryption of wireless transmissions.
• ### Data Collection: Sourcebook of Criminal Justice Statistics

This sourcebook is an annual publication of statistics about the criminal justice system, including characteristics of the criminal justice system, attitudes toward crime, types of offenses, characteristics of people arrested, processing of defendants, and people in the correctional system. Datasets come in PDF format or spreadsheet format
• ### Data Collection: Bureau of Justice Statistics

This page from the Bureau of Justice Statistics contains links to statistics about the criminal justice system. Some topics include: crime & victims; law enforcement; courts and sentencing; and expenditure & employment.
• ### Data Collection: Quick Reference Tables

This site provides tables of population, GNI per capita, total GNI, PPP GDP, and country classifications which can be used to make regional comparisons for people, environment, economy, states and markets, and global links. The data sets are from the year 2003. The tables are in Adobe Acrobat format.
• ### Statistical Engineering

A good resource for problems in statistics in engineering. Contains some applets, and good textual examples related to engineering. Some topics include Monte Carlo method, Central Limit Theorem, Risk, Logistic Regression, Generalized Linear .Models, and Confidence.
• ### Probability and Statistics Object Library

This library contains a plethera of downloadable applets and the components of the applets for use by teachers and students of probability and statistics. These objects (both executable files and source code) can be downloaded, modified if desired, and reused.

• ### Probability Distributions JAVA Applets with Reference Materials

This page of Statistical Java describes 11 different probability distributions including the Binomial, Poisson, Negative Binomial, Geometric, T, Chi-squared, Gamma, Weibull, Log-Normal, Beta, and F. Each distribution has its own applet in which users can manipulate the parameters to see how the distribution changes. The parameters are described on the main page as well as situations that would use each distribution. The equations of the distributions are not given. To select between the different applets you can click on Statistical Theory, Probability Distributions and then the Main Page. At the bottom of this page you can make your applet selection. This page was formerly located at http://www.stat.vt.edu/~sundar/java/applets/