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STATISTICAL DISTRIBUTION


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P value calculator logo
Subcategories: GraphPad

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

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High-Precision Distribution Calculators logo

Normal, Student's T, Chi-Square and F Statistical Tables from SOCR (UCLA)

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Random Number Generation logo
Subcategories: Random

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

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Power/Sample size calculator logo
Subcategories: Power , StatPages

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

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Online Probability Distributions logo
Subcategories: Xuru

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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Power & Sample Size Clinical trials logo
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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Random Assignment logo
Subcategories: Random , clinical trials

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

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Randomization.com logo
Subcategories: Random , clinical trials

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

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Power and sample size Java applets logo
Subcategories: Power

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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Gaussian Random Number Generator logo
Subcategories: Random

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

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Research Randomizer logo
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,

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Random Integer Generator logo
Subcategories: Random

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

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QMinim Online Minimization logo
Subcategories: Random , clinical trials

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

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