Online Calculators for Scientists

March 4, 20100 comments

"Numbers are like people; torture them enough and they'll tell you anything" goes a quotation. Sometimes, too much of data could leave you crippled, especially when you are not good in figures. For researchers, it never hurts to have some basic knowledge of statistics and online calculators like this, would come in handy. 
GraphPad, the makers of 'Prism' have posted this online utility where the following analyses can be performed online, without having to worry about downloading softwares, licenses and installations...

Categorical data
Fisher's, Chi square, McNemar's, Sign test, CI of proportion, NNT (number needed to treat).
Continuous data
Descriptive statistics, detect outlier, t test, CI of mean/difference/ratio/SD, post tests.
Statistical distributions and interpreting P values
Calculate P from t, z, r, F or chi-square, or vice-versa. View Binomial, Poisson or Gaussian distribution. Correct a P value for multiple comparisons and Bayes.
Random numbers
Assign subjects to groups, simulate data.
Chemical and radiochemical data
Create and convert molar solutions, convert moles & grams, radioactivity calculations. 

Also, check out the Graphpad library, loaded with biostatistics resources.

  Biostatistics -- getting started 
Learning statistics can be overwhelming. These resources can help you get started.

  Biostatistics -- specialized areas [14 subtopics]
Outliers, normality tests, power and sample size, and much more.

  Regression -- linear and nonlinear 
Nonlinear regression is one of the most common analyses used by biological scientists, yet it is a topic ignored by most statistics text books. These resources will help you learn, and master, nonlinear curve fitting.

  Pharmacology and biochemistry analyses
Information on analyzing pharmacokinetic, binding, dose-response and enzyme kinetic data.

Keywords: Biostatistics, Online calculators, statistics, Medical statistics,
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