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The scientific method refers to techniques used in scientific observation and measurement. How to create studies and experiments.

The University of Delaware, founded in 1743, offers over 100 academic majors; its distinguished faculty includes internationally known scientists, authors and teachers.

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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...

Comprehensive encyclopedia of mathematics with 13,000 detailed entries. Continually updated, extensively illustrated, and with interactive examples.

Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

Chemistry is the study of matter and energy and the interactions between them. Get facts for the elements in the periodic table. Find chemistry demonstrations and experiments and science fair projects. Get chemistry homework help with worked example ...

Statistics help and resources for students and teachers

Find psychology articles, student resources and psychology study guides. Explore psychology definitions and theories. Learn more about the history of psychology from biographies of major thinkers and timelines. Topics covered include personality psyc...