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  • Data Collection: Data & Information Services Center

    This collection of datasets addresses social science issues and is housed at the University of Wisconsin. Free registration is required to access the datasets.

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  • Data Collection: STAT LABS: Data

    These datasets come from the book "STAT LABS: Mathematical Statistics Through Applications." Below the link for each dataset are descriptions of the variables for that dataset. Datasets are in text format and address topics such as maternal smoking and infant health, video games, radon, cytomegalovirus DNA, HIV, crab molting, voting, snow gauge calibration, down syndrome, and tape drive quality.

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  • Data Collection: Datasets for "A Casebook for a First Course in Statistics and Data Analysis"

    This webpage presents three new datasets to accompany the book "A Casebook for a First Course in Statistics and Data Analysis" by Chatterjee, Handcock and Simonoff. The datasets address salaries of major league baseball players, state aid to Nassau County public schools, and the success of teams in the National Hockey League, 1995-1996. The datasets are available in Minitab, Text, and Statistix 4 format.

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  • Data Collection: Reserve Bank of Australia

    This is the homepage for the Reserve Bank of Australia. Browse data by Alphabetical Index of Statistics, Statistics by Frequency of Publication, or Bulletin Statistical Tables.

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  • Interactive Polynomial Model Fitting Applet

    This applet allows users to draw a curve on a graph, and then displays the polynomial fit of the curve.

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  • Wilcoxon Rank-Sum Table

    This table shows the critical values values of the Wilcoxon-Mann-Whitney statistics (Us) for various sample sizes (N1 and N2) and p-values (p).

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  • Chi-Square Distribution Table

    This page provides a table of Chi-square distribution probabilities with degress of freedom 1-45.

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  • Choosing the Right Test

    This page helps readers know which statistcal tests are appropriate for the different types of data. Two charts display the information. A discussion of study design and sample size, as well as exercise questions with solutions are also provided.

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  • Confidence Intervals

    This applet introduces the concept of confidence intervals. Select an alpha level, sample size, and the number of experiments, and click "Play." For each sample, the applet will show the data points as blue dots and the confidence interval as a red, vertical line. The true population mean is shown as a horizontal purple line, and green ovals indicate which intervals do not contain the true mean.

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  • Normal Approximation to Poisson Distribution

    This applet demonstrates the Normal approximation to the Poisson Distribution. Users can set the rate, lambda (‘é), and the number of trials, n, and observe how the shape of the distribution changes. The Poisson distribution is shown in blue, and the Normal distribution is shown in red.

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