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  • Statistics at Square One: The t tests

    Gives very detailed explanation of t-tests (confidence intervals, one-sample, two sample independent, two sample paired, pooled and unpooled variances). Discusses the assumptions that are made for each type of t-test. This topic is part of an online textbook.

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  • Comparing Two Independent Sample Means

    Textbook-like example showing the independent t-test. Gives a nice way for students to think through the problem and interpret results.

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  • Student's t-test Applet

    This page gives a short background on Student's t-test and provides three t-test calculators. Two perform t-tests for independent groups and one performs t-tests for matched pairs. Users type in individual data points or copy and paste the entire data set. Some examples are given for demonstration.

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