**StATS: ****Revising my definition section (created 2007-10-18)**.

I have a section on definitions and it is an odd mix of things. I want to simplify these pages by separating examples of how to calculate a particular statistic from the formal definition of the statistic. This would make the definition shorter and sweeter in most cases. Here's a list of proposed "how to calculate" pages. Items with an asterisk represent entries where the definition already includes an example of how to calculate the statistic.

- How to calculate alpha.
- How to calculate beta.
- How to calculate a binomial mean and standard deviation.*
- How to calculate a binomial probability.*
- How to calculate a biserial correlation.*
- How to calculate a conditional probability.*
- How to calculate a correlation.*
- How to calculate entropy.*
- How to calculate a geometric mean.*
- How to calculate an interquartile range.
- How to calculate kappa.*
- How to calculate a likelihood ratio.*
- How to calculate a Mann-Whitney test.*
- How to calculate a mean.*
- How to calculate a median.*
- How to calculate a mode.*
- How to calculate a normal probability.*
- How to calculate the odds.*
- How to calculate an odds ratio.*
- How to calculate percentiles.*
- How to calculate a phi coefficient.*
- How to calculate a Poisson mean and standard deviation.*
- How to calculate a Poisson probability.*
- How to calculate a p-value.
- How to calculate a range.*
- How to calculate a standard error.
- How to calculate a standard deviation.*
- How to calculate a t-statistic.
- How to calculate a weighted mean.
I'd also like to show how to draw various graphic displays.

- How to draw a boxplot.
- How to draw a control chart.
- How to draw a mosaic plot.
- How to draw a stem-and-leaf diagram.
Some calculations are so simple that I will keep the examples as part of the definition. These include:

- Negative Predictive Value
- Positive Predictive Value
- Sensitivity
- Specificity
It may be a while before I get to this, as this is a major overhaul.

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This page was written by Steve Simon while working at Children's Mercy Hospital. Although I do not hold the copyright for this material, I am reproducing it here as a service, as it is no longer available on the Children's Mercy Hospital website. Need more information? I have a page with general help resources. You can also browse for pages similar to this one at