Posts Tagged ‘ variance ’

Power Analysis and the Probability of Errors

September 22, 2012
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Power Analysis and the Probability of Errors

Power analysis is a very useful tool to estimate the statistical power from a study. It effectively allows a researcher to determine the needed sample size in order to obtained the required statistical power. Clients often ask (and rightfully so) what the sample size should be for a proposed project. Sample sizes end up being

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One-Way ANOVA

September 11, 2012
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One-Way ANOVA Analysis of variance is a tool used for a variety of purposes. Applications range from a common one-way ANOVA, to experimental blocking, to more complex nested designs. This first ANOVA example provides the necessary tools to analyze data using this technique. This example will show a basic one-way ANOVA. I will save the

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Example 7.17: The Smith College diploma problem

November 12, 2009
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Example 7.17: The Smith College diploma problem

Smith College is a residential women's liberal arts college in Northampton, MA that is steeped in tradition. One such tradition is to give each student at graduation a diploma at random (or more accurately, in a haphazard fashion). At the end of the ceremony, a diploma circle is formed, and students pass the diplomas that they receive to...

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