## 2007-10-18

Categories: Blog post Tags: Website details

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.