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Category: Statistical distribution

Subcategories: GraphPad

### Use this calculator to compute a P value from a Z, t, F, r, or chi-square value.

...continue to read### Normal, Student's T, Chi-Square and F Statistical Tables from SOCR (UCLA)

...continue to read### This web site allows you to generate random real numbers with different distribution patterns (uniform, left-skewed, right-skewed, bell-shaped).

...continue to read### This screen computes the sample size required to detect a difference between two proportions.

...continue to read### Online Probability Distributions allows you to work out accurate values of statistical functions associated to the most common probability distributions: Binomial Distribution, Geometric Distribution, Negative Binomial Distribution, Poisson Distribution, Hypergeometric Distribution, Normal Distribution, Chi-Square Distribution, Student-t Distribution, and Fisher-Snedecor

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Category: Statistical distribution

Subcategories: Power , clinical trials

### Online calculation for sample size, power or the minimal detectable difference for parallel studies, crossover studies, or studies to find associations between variables, where the dependent variable is Success or Failure, a Quantitative Measurement, or a time to an event such as a survival time.

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Category: Statistical distribution

Subcategories: Random , clinical trials

### This size site present applets for randomly assigning subjects to experimental groups.

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Category: Statistical distribution

Subcategories: Random , clinical trials

### Randomizatio.com is an online resource to help for block randomization in clinical trials.

...continue to read### This page from RV Lenth provides graphical interfaces for studying the power of one or more tests. They include sliders (convertible to number-entry fields) for varying parameters, and a simple provision for graphing one variable against another.

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Category: Statistical distribution

Subcategories: Random , clinical trials

### Research Randomizer is a closed-source, clinical randomization web service, It can be used for random sampling, random assignment to treatment groups, and block randomization. This randomization service has an excellent tutorial with five sample randomization scenarios for random sampling, random assignment, random block assignment, generating random numbers in a specified range, and random ordering of a set of items,

...continue to read### This web site allows you to generate random numbers from a Gaussian distribution under a given mean and standard deviation.

...continue to read### This page allows you to generate random integers in a given interval.

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Category: Statistical distribution

Subcategories: Random , clinical trials

### QMinim is an online free minimisation service for minimising subjects to different arms of a clinical trial.

...continue to read### The calculator helps in calculating the probability that a results associated to asignificant P value, after doing a single unbiased experiment, is a false positive. False positive risk (FPR) is defined here as the probability that a result which is significant at a specified P value, is a false positive result.

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