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  • 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.

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  • Analysis Tool: ANOVA (ANalysis Of VAriance between groups)

    A computational tool that runs the one-way ANOVA by the user inputing individual data or by copying and pasting a delimitted data set.

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  • Probability Spaces

    This online, interactive lesson on probability spaces provides examples, exercises, and applets that cover conditional probability, independence, and several modes of convergence that are appropriate for random variables. This section also covers probability space, the paradigm of a random experiment and its mathematical model as well as sample spaces, events, random variables, and probability measures.

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  • Analysis Tool: Statistics Online Computational Resources (SOCR)

    This applets on this site include: interactive graphs of many distribution models; a collection of computer generated games; a collection of data modeling aids including curve fitting, wavelets, matrix manipulations, etc.; p-values, quantiles & tail-probabilities calculations; virtual online probability experiments and demonstrations; and a large collection of statistical techniques for online data analysis, visualization, and integration.

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  • Dataset: Oral Fertility Study in Male and Female Rats

    This dataset comes from a study on 200 rats (100 of each gender) which were given one of 5 treatments, and then allowed to mate. At delivery, information on the pups was collected, and a sample of 8 pups (4 of each gender) was chosen from each litter. Body weights for these pups were recorded once a week for three weeks. Questions this study focused on refer to the safety of the treatments. A text file version of the data is found in the relation link.

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  • IDEAL: Probability Definitions

    This module discusses the probability of an event and relative frequency. The applet shows how empirical probability converges to theoretical probability as the sample size increases. The follow-up example includes an applet that simulates drawing differently colored balls from an urn.

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  • Dataset Example: Pay for Play: Are Baseball Salaries Based on Performance?

    The dataset presented in this article provides the salary and performance data for non-pitchers for the 1992 Major League Baseball season. Exploratory data analysis is used to determine a suitable regression model for the data. Key Words: Model selection and validation; Stepwise model selection.

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  • Video: Statz Rappers

    This video is a humorous refresher of statistics methodology. This rap video presents a parody with statistical references. It is quite entertaining.

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  • Statistics at Square One: Exact Probability Test

    This section of an online textbook discusses calculating the exact probability using observed sets of frequencies, constructing frequency tables, and computing p-values. Exercises and answers are provided.

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  • 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.

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