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Research Randomizer -- A Free Tool for Instant Random Sampling and Assignment.

Math help since 1998. Math Goodies helps kids at all levels with interactive instruction and free resources. Get help online or offline.

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Psychic Science - free educational-entertainment resources for psychical research, parapsychology and mind magic, including ESP tests and psychic games

User-friendly introduction to statistics, probability, and survey sampling. Free, online tutorials - a general statistics tutorial and a tutorial tailored to the Advanced Placement (AP) Statistics curriculum. Online tools - statistical tables, probab...

GraphPad Prism is a powerful combination of biostatistics, curve fitting (nonlinear regression) and scientific graphing in one comprehensive program. Easily organize, analyze and graph repeated experiments; pick appropriate statistical tests and inte...

Robert Davies

Calculators online for finance, math, algebra, trigonometry, fractions, physics and time. Use an online calculator, search or suggest a new calculator that we can build for free online use. Conversions and calculators to use online for free. Formerl...

MathWorks is the world’s leading developer of technical computing software for engineers and scientists in industry, government, and education