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(7 classifications) (352 resources)


Statistical Topic Classifications
Elementary Probability (270)
Limit Theorems (95)
Multivariate Distributions (141)
Probability Measures (11)
Simulation (166)
Stochastic Processes (78)
Univariate Distributions (376)

View Resource Benford's Law Part 1 - How to Spot Tax Fraud

This page explores Benford's Law: For naturally occurring data, the digits 1 through 9 do not have equal probability of being the first significant digit in a number; the digit 1 has greater odds of being the first significant digit than the others. This law can be used to catch tax fraud because truly random numbers used by embezzlers do not meet this condition.'s%20Law.html
View Resource Benford's Law Part 2 - The 80/20 Rule or Pareto Principle

This page explores Benford's law and the Pareto Principle (or 80/20 rule). Benford's law may also have a wider meaning if the digits it evaluates are considered ranks or places. The digit's probability of occurring could be considered the relative share of total winnings for each place (1st through 9th). In other words, 1st place would win 30.1%, 2nd place 17.6%, 3rd 12.5%,... 9th place 4.6% of...'s%20Law2.html
View Resource Binomial Proportions

This calculator computes the probability that two proportions are equal, given sample proportions. The user inputs values for x1, n1, x2, and n2. The null hypothesis is that the two proportions are equal.
View Resource Box Model

This virtual applet simulates randomly drawing numbers from a box. You can choose which numbers you would like to choose from and the number of draws. The applet has the option to show theoretical probability and displays the results in histogram form.
View Resource Cartoon: Probability 101

Cartoon to be used in talking about probability models (the process of drawing objects from an urn as a basic probability model goes back at least to Jacob Bernoulli's 1713 paper Ars conjectandi). Cartoon by John Landers ( based on an idea from Dennis Pearl (The Ohio State University). Free to use in the classroom and on course web sites.
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